FPUS55 KTFX 182137 ZFPTFX Zone Forecast Product for Central and Southwest Montana National Weather Service Great Falls MT 336 PM MDT Mon May 18 2026 Spot temperatures and probabilities of measurable precipitation are for tonight, Tuesday, Tuesday night, and Wednesday. MTZ301-191000- East Glacier Park Region- Including the cities of East Glacier Park, Kiowa, Babb, Saint Mary, Marias Pass, and Logan Pass 336 PM MDT Mon May 18 2026 .TONIGHT...Mostly cloudy then becoming partly cloudy after midnight then becoming mostly cloudy. A 20 percent chance of rain showers and snow showers early in the evening. Lows 25 to 31. Southwest winds 5 to 15 mph with gusts to around 30 mph. .TUESDAY...Not as cool. Partly sunny. Chance of rain showers, snow showers and slight chance of thunderstorms in the afternoon. Highs 43 to 55. West winds 10 to 20 mph with gusts to around 35 mph. Chance of precipitation 50 percent. .TUESDAY NIGHT...Mostly cloudy. Chance of rain showers and snow showers in the evening, then chance of rain and snow after midnight. Lows 32 to 38. West winds 5 to 15 mph with gusts to around 35 mph. Chance of precipitation 50 percent. .WEDNESDAY...Rain and snow likely in the morning, then rain showers, snow showers and slight chance of thunderstorms in the afternoon. Light snow accumulations. Highs 39 to 47. Northwest winds 5 to 10 mph. Chance of precipitation near 100 percent. .WEDNESDAY NIGHT...Mostly cloudy. Rain and snow likely in the evening, then chance of snow and rain after midnight. Light snow accumulations. Snow level 6300 feet. Lows 29 to 35. Northwest winds up to 10 mph. Chance of precipitation 70 percent. .THURSDAY AND THURSDAY NIGHT...Partly cloudy. Highs 46 to 56. Lows 32 to 38. .FRIDAY...Not as cool. Mostly sunny. A 20 percent chance of rain in the afternoon. Highs 50 to 62. .FRIDAY NIGHT THROUGH SUNDAY...Partly cloudy. Lows 36 to 45. Highs 54 to 66. .SUNDAY NIGHT...Partly cloudy. A 20 percent chance of rain after midnight. Lows 39 to 45. .MEMORIAL DAY...Breezy. Mostly sunny. Slight chance of rain and snow in the morning, then slight chance of rain in the afternoon. Highs 53 to 63. Chance of precipitation 20 percent. $$ MTZ307-191000- Southern Rocky Mountain Front- Including the city of Rogers Pass 336 PM MDT Mon May 18 2026 .TONIGHT...Mostly cloudy early in the evening then becoming partly cloudy. A 20 percent chance of rain showers and snow showers early in the evening. Lows 22 to 28. West winds up to 10 mph. Gusts up to 25 mph after midnight. .TUESDAY...Not as cool. Mostly sunny. Chance of rain showers, snow showers and slight chance of thunderstorms in the afternoon. Highs 43 to 55. West winds 5 to 15 mph with gusts to around 35 mph. Chance of precipitation 50 percent. .TUESDAY NIGHT...Mostly cloudy. A 20 percent chance of rain showers and snow showers in the evening. Lows 29 to 35. West winds 5 to 15 mph with gusts to around 35 mph. .WEDNESDAY...Mostly cloudy. Chance of rain and snow in the morning, then rain showers, slight chance of thunderstorms and snow showers in the afternoon. Light snow accumulations. Highs 40 to 50. West winds 5 to 10 mph with gusts to around 25 mph. Chance of precipitation 90 percent. .WEDNESDAY NIGHT...Mostly cloudy. Rain showers, snow and slight chance of thunderstorms in the evening, then chance of snow and rain after midnight. Moderate snow accumulations. Snow level 6800 feet. Lows 28 to 34. North winds up to 10 mph with gusts to around 25 mph. Chance of precipitation 90 percent. .THURSDAY...Mostly sunny. A 40 percent chance of snow and rain in the morning. Highs 45 to 55. .THURSDAY NIGHT THROUGH FRIDAY NIGHT...Partly cloudy. Lows 29 to 39. Highs 50 to 62. .SATURDAY THROUGH SUNDAY NIGHT...Partly cloudy. Highs 55 to 69. Lows 38 to 45. .MEMORIAL DAY...Mostly sunny. A 20 percent chance of thunderstorms in the afternoon. Highs 55 to 67. $$ MTZ302-191000- Northern High Plains- Including the cities of Browning, Heart Butte, and Dupuyer 336 PM MDT Mon May 18 2026 .TONIGHT...Mostly cloudy with a 20 percent chance of rain showers early in the evening, then partly cloudy in the late evening and overnight. Lows in the lower 30s. Southwest winds 5 to 15 mph. Gusts up to 30 mph after midnight. .TUESDAY...Breezy. Mostly sunny. A 20 percent chance of thunderstorms in the afternoon. Highs in the upper 50s. West winds 15 to 25 mph. .TUESDAY NIGHT...Mostly cloudy. Slight chance of rain showers in the evening, then chance of rain after midnight. Lows in the upper 30s. West winds 10 to 20 mph. Chance of precipitation 40 percent. .WEDNESDAY...Rain likely in the morning, then rain showers and slight chance of thunderstorms in the afternoon. Highs around 50. Northwest winds 5 to 15 mph. Chance of precipitation near 100 percent. .WEDNESDAY NIGHT...Mostly cloudy. Rain likely in the evening, then slight chance of rain after midnight. Lows in the mid 30s. Northwest winds 5 to 15 mph. Chance of rain 70 percent. .THURSDAY AND THURSDAY NIGHT...Partly cloudy. Highs in the upper 50s. Lows in the upper 30s. .FRIDAY AND FRIDAY NIGHT...Partly cloudy. Highs in the mid 60s. Lows in the lower 40s. .SATURDAY THROUGH SUNDAY NIGHT...Partly cloudy. Highs in the lower 70s. Lows in the mid 40s. .MEMORIAL DAY...Breezy. Mostly sunny. A 20 percent chance of rain in the afternoon. Highs in the upper 60s. $$ MTZ308-191000- Southern High Plains- Including the cities of Bynum, Choteau, and Pendroy 336 PM MDT Mon May 18 2026 .TONIGHT...Mostly cloudy with a 20 percent chance of rain showers early in the evening, then partly cloudy in the late evening and overnight. Lows around 30. Southwest winds up to 10 mph. Gusts up to 25 mph after midnight. .TUESDAY...Mostly sunny. A 20 percent chance of thunderstorms in the afternoon. Highs in the lower 60s. West winds 5 to 15 mph with gusts to around 30 mph. .TUESDAY NIGHT...Mostly cloudy. A 20 percent chance of rain showers in the evening. Lows in the upper 30s. West winds 5 to 10 mph with gusts to around 30 mph. .WEDNESDAY...Partly sunny with chance of rain in the morning, then cloudy with rain showers and slight chance of thunderstorms in the afternoon. Highs in the mid 50s. Northwest winds 5 to 10 mph. Chance of precipitation 90 percent. .WEDNESDAY NIGHT...Mostly cloudy. Rain in the evening, then chance of rain after midnight. Lows in the mid 30s. Northwest winds 5 to 10 mph. Chance of rain 90 percent. .THURSDAY...Mostly sunny. A 40 percent chance of rain in the morning. Highs in the lower 60s. .THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows in the upper 30s. Highs in the upper 60s. .FRIDAY NIGHT AND SATURDAY...Partly cloudy. Lows in the lower 40s. Highs in the mid 70s. .SATURDAY NIGHT THROUGH SUNDAY NIGHT...Partly cloudy. Lows in the upper 40s. Highs in the mid 70s. .MEMORIAL DAY...Mostly sunny. A 20 percent chance of thunderstorms in the afternoon. Highs in the mid 70s. $$ MTZ303-191000- Eastern Glacier, Western Toole, and Central Pondera- Including the cities of Cut Bank, Ethridge, and Santa Rita 336 PM MDT Mon May 18 2026 .TONIGHT...Mostly cloudy with a 20 percent chance of rain showers early in the evening, then partly cloudy in the late evening and overnight. Lows around 30. Southwest winds 5 to 10 mph. .TUESDAY...Mostly sunny. A 20 percent chance of thunderstorms in the afternoon. Highs in the lower 60s. West winds 5 to 20 mph. .TUESDAY NIGHT...Mostly cloudy. Chance of rain showers in the evening, then slight chance of rain after midnight. Lows in the upper 30s. West winds 5 to 15 mph with gusts to around 30 mph. Chance of precipitation 40 percent. .WEDNESDAY...Mostly cloudy. Chance of rain in the morning, thenrain showers and slight chance of thunderstorms in the afternoon. Highs in the mid 50s. Northwest winds 10 to 15 mph. Chance of precipitation 90 percent. .WEDNESDAY NIGHT...Mostly cloudy. Chance of rain in the evening, then slight chance of rain after midnight. Lows in the mid 30s. Northwest winds 10 to 15 mph. Chance of rain 50 percent. .THURSDAY AND THURSDAY NIGHT...Partly cloudy. Highs in the lower 60s. Lows in the upper 30s. .FRIDAY AND FRIDAY NIGHT...Partly cloudy. Highs in the upper 60s. Lows in the lower 40s. .SATURDAY THROUGH MEMORIAL DAY...Breezy. Partly cloudy. Highs in the mid 70s. Lows in the mid 40s. && TEMPERATURE / PRECIPITATION Cut Bank 29 63 37 53 / 30 20 30 90 $$ MTZ304-191000- Eastern Toole and Liberty- Including the cities of Devon, Shelby, Chester, Galata, Joplin, Lothair, and Whitlash 336 PM MDT Mon May 18 2026 .TONIGHT...Mostly cloudy in the evening then becoming partly cloudy. Lows around 30. South winds up to 10 mph with gusts to around 25 mph. .TUESDAY...Mostly sunny. Chance of rain showers and slight chance of thunderstorms in the afternoon. Highs in the mid 60s. West winds up to 15 mph. Chance of precipitation 50 percent. .TUESDAY NIGHT...Mostly cloudy. A 50 percent chance of rain showers in the evening. Lows in the upper 30s. West winds 5 to 10 mph with gusts to around 25 mph. .WEDNESDAY...Mostly cloudy. Slight chance of rain in the morning, then rain showers likely and slight chance of thunderstorms in the afternoon. Highs 53 to 59. Northwest winds 5 to 15 mph with gusts to around 30 mph. Chance of precipitation 70 percent. .WEDNESDAY NIGHT...Mostly cloudy. A 50 percent chance of rain in the evening. Lows in the mid 30s. Northwest winds 5 to 15 mph. .THURSDAY AND THURSDAY NIGHT...Partly cloudy. Highs in the lower 60s. Lows in the upper 30s. .FRIDAY AND FRIDAY NIGHT...Partly cloudy. Highs in the upper 60s. Lows in the lower 40s. .SATURDAY THROUGH MEMORIAL DAY...Partly cloudy. Highs 74 to 80. Lows in the upper 40s. $$ MTZ305-191000- Hill County- Including the city of Havre 336 PM MDT Mon May 18 2026 .TONIGHT...Partly cloudy. Lows around 30. Southeast winds up to 10 mph. .TUESDAY...Warmer. Mostly sunny. Chance of rain showers and slight chance of thunderstorms in the afternoon. Highs in the mid 60s. Southwest winds 5 to 15 mph. Chance of precipitation 50 percent. .TUESDAY NIGHT...Mostly cloudy. A 50 percent chance of rain showers in the evening. Lows around 40. Southwest winds 5 to 10 mph. .WEDNESDAY...Mostly cloudy. Chance of rain in the morning, then rain showers likely and slight chance of thunderstorms in the afternoon. Highs in the upper 50s. Northwest winds 5 to 15 mph. Chance of precipitation 70 percent. .WEDNESDAY NIGHT...Mostly cloudy. A 20 percent chance of rain in the evening. Lows in the upper 30s. Northwest winds 5 to 15 mph. .THURSDAY AND THURSDAY NIGHT...Partly cloudy. Highs in the mid 60s. Lows in the upper 30s. .FRIDAY AND FRIDAY NIGHT...Partly cloudy. Highs around 70. Lows in the lower 40s. .SATURDAY...Sunny. Highs in the upper 70s. .SATURDAY NIGHT THROUGH MEMORIAL DAY...Partly cloudy. Lows in the upper 40s. Highs in the lower 80s. && TEMPERATURE / PRECIPITATION Havre 28 68 40 60 / 0 40 60 50 $$ MTZ306-191000- Northern Blaine County- Including the cities of Chinook, Zurich, Harlem, Hogeland, and Fort Belknap 336 PM MDT Mon May 18 2026 .TONIGHT...Mostly clear. Lows in the upper 20s. Southeast winds 5 to 10 mph. .TUESDAY...Warmer. Mostly sunny. A 20 percent chance of rain showers in the afternoon. Highs in the mid 60s. Southeast winds 5 to 15 mph shifting to the southwest 10 to 15 mph in the afternoon. Gustsup to 30 mph. .TUESDAY NIGHT...Not as cool. Mostly cloudy. A 20 percent chance of rain showers in the evening. Lows in the upper 30s. South winds up to 10 mph. .WEDNESDAY...Partly sunny. Slight chance of rain in the morning, then chance of rain showers and slight chance of thunderstorms in the afternoon. Highs in the upper 50s. West winds 5 to 15 mph shifting to the northwest 15 to 20 mph in the afternoon. Chance of precipitation 50 percent. .WEDNESDAY NIGHT...Mostly cloudy. Slight chance of rain in the evening, then chance of rain after midnight. Lows in the upper 30s. Northwest winds 5 to 15 mph. Chance of rain 40 percent. .THURSDAY...Partly sunny. Highs in the lower 60s. .THURSDAY NIGHT THROUGH FRIDAY NIGHT...Partly cloudy. Lows in the upper 30s. Highs in the upper 60s. .SATURDAY...Sunny. Highs in the mid 70s. .SATURDAY NIGHT THROUGH SUNDAY NIGHT...Partly cloudy. Lows in the upper 40s. Highs in the upper 70s. .MEMORIAL DAY...Breezy, sunny. Highs in the lower 80s. $$ MTZ309-191000- Eastern Pondera and Eastern Teton- Including the cities of Brady, Conrad, and Ledger 336 PM MDT Mon May 18 2026 .TONIGHT...Mostly cloudy in the evening then becoming partly cloudy. Lows in the upper 20s. Southwest winds up to 10 mph. .TUESDAY...Mostly sunny. A 20 percent chance of thunderstorms in the afternoon. Highs in the mid 60s. West winds up to 15 mph. .TUESDAY NIGHT...Mostly cloudy. A 20 percent chance of rain showers in the evening. Lows in the upper 30s. West winds 5 to 10 mph. Gusts up to 25 mph in the evening. .WEDNESDAY...Mostly cloudy. Chance of rain in the morning, then rain showers and slight chance of thunderstorms in the afternoon. Highs in the mid 50s. Northwest winds 5 to 10 mph. Chance of precipitation 90 percent. .WEDNESDAY NIGHT...Mostly cloudy. Rain likely in the evening, then chance of rain after midnight. Lows in the mid 30s. Northwest winds 5 to 15 mph. Chance of rain 70 percent. .THURSDAY...Mostly sunny. A 20 percent chance of rain in the morning. Highs in the lower 60s. .THURSDAY NIGHT THROUGH FRIDAY NIGHT...Partly cloudy. Lows in the upper 30s. Highs in the upper 60s. .SATURDAY THROUGH SUNDAY NIGHT...Partly cloudy. Highs in the upper 70s. Lows in the upper 40s. .MEMORIAL DAY...Mostly sunny. A 20 percent chance of rain in the afternoon. Highs in the upper 70s. $$ MTZ310-191000- Western and Central Chouteau County- Including the cities of Floweree, Carter, and Fort Benton 336 PM MDT Mon May 18 2026 .TONIGHT...Partly cloudy. Lows around 30. Southeast winds up to 10 mph. .TUESDAY...Warmer. Sunny in the morning, then partly sunny with chance of rain showers and slight chance of thunderstorms in the afternoon. Highs in the mid 60s. Southwest winds up to 10 mph. Chance of precipitation 40 percent. .TUESDAY NIGHT...Mostly cloudy. A 50 percent chance of rain showers in the evening. Lows around 40. Southwest winds 5 to 10 mph. .WEDNESDAY...Mostly cloudy. Chance of rain in the morning, then rain showers likely and slight chance of thunderstorms in the afternoon. Highs in the upper 50s. Northwest winds 5 to 15 mph. Chance of precipitation 70 percent. .WEDNESDAY NIGHT...Mostly cloudy. Rain likely in the evening, then chance of rain after midnight. Lows in the upper 30s. Northwest winds 5 to 15 mph. Chance of rain 70 percent. .THURSDAY...Mostly sunny. Chance of rain in the morning, then slight chance of rain in the afternoon. Highs in the lower 60s. Chance of rain 50 percent. .THURSDAY NIGHT THROUGH FRIDAY NIGHT...Partly cloudy. Lows around 40. Highs in the upper 60s. .SATURDAY...Sunny. Highs in the upper 70s. .SATURDAY NIGHT THROUGH SUNDAY NIGHT...Partly cloudy. Lows in the upper 40s. Highs around 80. .MEMORIAL DAY...Mostly sunny. A 20 percent chance of thunderstorms in the afternoon. Highs around 80. $$ MTZ311-191000- BearsPaw Mountains and Southern Blaine- Including the city of Rocky Boy 336 PM MDT Mon May 18 2026 .TONIGHT...Mostly clear. Lows in the upper 20s. East winds up to 10 mph shifting to the south after midnight. .TUESDAY...Warmer. Mostly sunny. A 20 percent chance of rain showers in the afternoon. Highs 61 to 67. Southwest winds 5 to 10 mph. .TUESDAY NIGHT...Not as cool. Mostly cloudy. A 20 percent chance of thunderstorms in the evening. Lows in the lower 40s. Southwest winds up to 10 mph. .WEDNESDAY...Partly sunny. Slight chance of rain in the morning, then rain showers likely and slight chance of thunderstorms in the afternoon. Highs 54 to 60. Northwest winds 5 to 15 mph. Chance of precipitation 70 percent. .WEDNESDAY NIGHT...Mostly cloudy with a 50 percent chance of rain. Lows around 40. Northwest winds up to 10 mph with gusts to around 25 mph. .THURSDAY...Partly sunny with a 20 percent chance of rain. Highs 58 to 64. .THURSDAY NIGHT THROUGH FRIDAY NIGHT...Partly cloudy. Lows in the lower 40s. Highs 64 to 70. .SATURDAY...Warmer, sunny. Highs 72 to 78. .SATURDAY NIGHT THROUGH SUNDAY NIGHT...Partly cloudy. Lows around 50. Highs 75 to 81. .MEMORIAL DAY...Sunny. Highs 77 to 83. $$ MTZ312-191000- Cascade County below 5000ft- Including the city of Great Falls 336 PM MDT Mon May 18 2026 .TONIGHT...Partly cloudy. Lows around 30. South winds up to 10 mph. .TUESDAY...Not as cool. Mostly sunny. A 20 percent chance of thunderstorms in the afternoon. Highs in the mid 60s. Southwest winds 5 to 15 mph. .TUESDAY NIGHT...Mostly cloudy. A 20 percent chance of rain showers in the evening. Lows around 40. Southwest winds 5 to 10 mph. .WEDNESDAY...Mostly cloudy. Chance of rain in the morning, then rain showers likely and slight chance of thunderstorms in the afternoon. Highs in the mid 50s. West winds 5 to 10 mph shifting to the north in the afternoon. Chance of precipitation 70 percent. .WEDNESDAY NIGHT...Mostly cloudy. Rain showers and slight chance of thunderstorms in the evening, then chance of rain after midnight. Lows in the upper 30s. Northwest winds up to 10 mph. Chance of precipitation 90 percent. .THURSDAY...Partly sunny. Chance of rain in the morning, then slight chance of rain in the afternoon. Highs in the lower 60s. Chance of rain 50 percent. .THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows in the upper 30s. Highs in the upper 60s. .FRIDAY NIGHT...Partly cloudy. Lows in the lower 40s. .SATURDAY...Sunny. Highs in the mid 70s. .SATURDAY NIGHT THROUGH SUNDAY NIGHT...Partly cloudy. Lows around 50. Highs in the upper 70s. .MEMORIAL DAY...Mostly sunny. A 20 percent chance of thunderstorms in the afternoon. Highs in the upper 70s. && TEMPERATURE / PRECIPITATION Great Falls Arpt 30 64 40 56 / 0 40 20 70 $$ MTZ313-191000- Judith Basin County and Judith Gap- Including the cities of Raynesford, Geyser, Stanford, Windham, Benchland, Hobson, and Moccasin 336 PM MDT Mon May 18 2026 .TONIGHT...Mostly clear. Lows in the upper 20s. Northeast winds up to 10 mph shifting to the south after midnight. .TUESDAY...Not as cool. Mostly sunny. A 20 percent chance of thunderstorms in the afternoon. Highs around 60. West winds 5 to 10 mph. .TUESDAY NIGHT...Not as cool. Mostly cloudy. A 20 percent chance of rain showers in the evening. Lows in the upper 30s. Southwest winds up to 15 mph. .WEDNESDAY...Mostly sunny with slight chance of rain in the morning, then mostly cloudy with rain showers and chance of thunderstorms in the afternoon. Highs in the mid 50s. Northwest winds 5 to 15 mph. Chance of precipitation 80 percent. .WEDNESDAY NIGHT...Rain showers and slight chance of thunderstorms in the evening, then rain likely and slight chance of snow after midnight. Lows in the mid 30s. Northwest winds 5 to 15 mph. Chance of precipitation 90 percent. .THURSDAY...Partly sunny. Rain likely in the morning, then chance of rain showers and slight chance of thunderstorms in the afternoon. Highs in the upper 50s. Chance of precipitation 60 percent. .THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows in the mid 30s. Highs in the mid 60s. .FRIDAY NIGHT...Partly cloudy. Lows in the lower 40s. .SATURDAY...Sunny. Highs in the lower 70s. .SATURDAY NIGHT THROUGH SUNDAY NIGHT...Partly cloudy. Lows in the upper 40s. Highs in the mid 70s. .MEMORIAL DAY...Mostly sunny. A 20 percent chance of thunderstorms in the afternoon. Highs in the upper 70s. $$ MTZ314-191000- Fergus County below 4500ft- Including the cities of Hilger and Lewistown 336 PM MDT Mon May 18 2026 .TONIGHT...Mostly clear. Lows in the upper 20s. East winds up to 10 mph shifting to the south after midnight. .TUESDAY...Warmer. Mostly sunny. A 20 percent chance of rain showers in the afternoon. Highs 61 to 67. Southwest winds up to 10 mph. .TUESDAY NIGHT...Not as cool. Mostly cloudy. A 20 percent chance of rain showers in the evening. Lows around 40. Southwest winds up to 10 mph. .WEDNESDAY...Partly sunny. Chance of rain showers and slight chance of thunderstorms in the afternoon. Highs 56 to 62. West winds 5 to 15 mph. Chance of precipitation 50 percent. .WEDNESDAY NIGHT...Rain showers and slight chance of thunderstorms in the evening, then rain likely after midnight. Lows around 40. Northwest winds 5 to 15 mph. Chance of precipitation 80 percent. .THURSDAY...Partly sunny with a 50 percent chance of rain. Highs 57 to 63. .THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows in the upper 30s. Highs in the upper 60s. .FRIDAY NIGHT...Partly cloudy. Lows in the lower 40s. .SATURDAY...Sunny. Highs in the mid 70s. .SATURDAY NIGHT THROUGH SUNDAY NIGHT...Partly cloudy. Lows in the upper 40s. Highs in the upper 70s. .MEMORIAL DAY...Sunny. Highs 78 to 84. && TEMPERATURE / PRECIPITATION Lewistown 26 60 36 56 / 0 20 30 70 $$ MTZ315-191000- Upper Blackfoot and MacDonald Pass- Including the cities of Marysville, Lincoln, Flesher Pass, and MacDonald Pass 336 PM MDT Mon May 18 2026 .TONIGHT...Partly cloudy. Lows in the upper 20s. West winds up to 10 mph. .TUESDAY...Not as cool. Mostly sunny. A 20 percent chance of thunderstorms in the afternoon. Highs 49 to 59. West winds up to 15 mph. .TUESDAY NIGHT...Partly cloudy. A 20 percent chance of rain showers in the evening. Lows in the mid 30s. West winds up to 10 mph with gusts to around 25 mph. .WEDNESDAY...Mostly sunny. Chance of rain showers and slight chance of thunderstorms in the afternoon. Highs 46 to 54. West winds up to 15 mph. Chance of precipitation 50 percent. .WEDNESDAY NIGHT...Rain showers and slight chance of thunderstorms in the evening, then rain and snow likely after midnight. Lows in the mid 30s. North winds up to 10 mph. Gusts up to 25 mph in the evening. Chance of precipitation 90 percent. .THURSDAY...Partly sunny. A 50 percent chance of rain and snow in the morning. Highs 50 to 58. .THURSDAY NIGHT THROUGH FRIDAY NIGHT...Partly cloudy. Lows in the upper 30s. Highs 55 to 65. .SATURDAY...Sunny. Highs 62 to 70. .SATURDAY NIGHT THROUGH SUNDAY NIGHT...Partly cloudy. Lows in the mid 40s. Highs 65 to 73. .MEMORIAL DAY...Mostly sunny. A 20 percent chance of thunderstorms in the afternoon. Highs 64 to 72. $$ MTZ316-191000- Gates of the Mountains- Including the cities of Canyon Creek, Wolf Creek, and Craig 336 PM MDT Mon May 18 2026 .TONIGHT...Mostly cloudy early in the evening then becoming partly cloudy. Lows in the upper 20s. Southwest winds up to 10 mph. .TUESDAY...Not as cool. Mostly sunny. A 20 percent chance of thunderstorms in the afternoon. Highs 56 to 64. Southwest winds 5 to 10 mph with gusts to around 25 mph. .TUESDAY NIGHT...Partly cloudy. A 20 percent chance of rain showers in the evening. Lows in the upper 30s. Southwest winds up to 10 mph. .WEDNESDAY...Mostly sunny with slight chance of rain in the morning, then mostly cloudy with rain showers likely and slight chance of thunderstorms in the afternoon. Highs 49 to 57. Southwest winds up to 10 mph shifting to the northwest in the afternoon. Chance of precipitation 70 percent. .WEDNESDAY NIGHT...Rain showers and slight chance of thunderstorms in the evening, then rain likely and slight chance of snow after midnight. Lows in the upper 30s. North winds up to 15 mph. Chance of precipitation 90 percent. .THURSDAY...Partly sunny. A 50 percent chance of rain and snow in the morning. Highs 56 to 62. .THURSDAY NIGHT THROUGH FRIDAY NIGHT...Partly cloudy. Lows around 40. Highs 61 to 69. .SATURDAY...Warmer, sunny. Highs 68 to 76. .SATURDAY NIGHT THROUGH SUNDAY NIGHT...Partly cloudy. Lows in the upper 40s. Highs 71 to 79. .MEMORIAL DAY...Mostly sunny. A 20 percent chance of thunderstorms in the afternoon. Highs 70 to 78. $$ MTZ317-191000- Little Belt and Highwood Mountains- Including the cities of Monarch, Neihart, and Kings Hill Pass 336 PM MDT Mon May 18 2026 .TONIGHT...Partly cloudy. Lows 22 to 28. North winds up to 5 mph shifting to the southwest after midnight. .TUESDAY...Not as cool. Mostly sunny. A 20 percent chance of thunderstorms and snow showers in the afternoon. Highs 49 to 57. West winds 5 to 15 mph. .TUESDAY NIGHT...Mostly cloudy. A 50 percent chance of rain showers in the evening. Lows 32 to 38. Southwest winds up to 10 mph with gusts to around 25 mph. .WEDNESDAY...Mostly sunny with slight chance of rain in the morning, then mostly cloudy with rain showers likely and chance of thunderstorms in the afternoon. Highs 44 to 52. West winds 5 to 15 mph. Chance of precipitation 70 percent. .WEDNESDAY NIGHT...Rain showers and slight chance of thunderstorms in the evening, then rain and snow likely after midnight. Moderate snow accumulations. Lows 31 to 37. Northwest winds up to 10 mph with gusts to around 25 mph. Chance of precipitation 90 percent. .THURSDAY...Partly sunny. Snow and rain likely in the morning, then chance of rain showers, snow showers and slight chance of thunderstorms in the afternoon. Highs 47 to 55. Chance of precipitation 70 percent. .THURSDAY NIGHT...Partly cloudy. Lows 31 to 37. .FRIDAY...Not as cool. Mostly sunny. A 20 percent chance of rain in the afternoon. Highs 54 to 62. .FRIDAY NIGHT...Partly cloudy. Lows 34 to 42. .SATURDAY...Sunny. Highs 62 to 68. .SATURDAY NIGHT THROUGH SUNDAY NIGHT...Partly cloudy. Lows 40 to 50. Highs 66 to 72. .MEMORIAL DAY...Mostly sunny. Slight chance of rain in the morning, then slight chance of thunderstorms in the afternoon. Highs 67 to 73. Chance of precipitation 20 percent. $$ MTZ318-191000- Snowy and Judith Mountains- 336 PM MDT Mon May 18 2026 .TONIGHT...Mostly clear. Lows in the lower 20s. North winds up to 10 mph shifting to the south after midnight. .TUESDAY...Not as cool. Mostly sunny. A 20 percent chance of thunderstorms in the afternoon. Highs 50 to 58. West winds up to 10 mph. .TUESDAY NIGHT...Not as cool. Mostly cloudy. A 20 percent chance of rain showers in the evening. Lows in the mid 30s. Southwest winds up to 10 mph with gusts to around 25 mph. .WEDNESDAY...Mostly sunny in the morning, then mostly cloudy with rain showers likely and chance of thunderstorms in the afternoon. Highs 48 to 56. Northwest winds 5 to 15 mph with gusts to around 30 mph. Chance of precipitation 70 percent. .WEDNESDAY NIGHT...Rain showers and slight chance of thunderstorms in the evening, then rain and snow likely after midnight. Light snow accumulations. Lows in the mid 30s. Northwest winds 5 to 10 mph with gusts to around 25 mph. Chance of precipitation 90 percent. .THURSDAY...Partly sunny. Rain and snow likely in the morning, then chance of rain showers and slight chance of thunderstorms in the afternoon. Highs 48 to 54. Chance of precipitation 70 percent. .THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows in the mid 30s. Highs 54 to 62. .FRIDAY NIGHT...Partly cloudy. Lows in the upper 30s. .SATURDAY...Warmer, sunny. Highs 64 to 70. .SATURDAY NIGHT THROUGH SUNDAY NIGHT...Partly cloudy. Lows in the mid 40s. Highs 67 to 75. .MEMORIAL DAY...Mostly sunny. A 20 percent chance of thunderstorms in the afternoon. Highs 69 to 77. $$ MTZ319-191000- Helena Valley- Including the city of Helena 336 PM MDT Mon May 18 2026 .TONIGHT...Partly cloudy. Lows in the upper 20s. West winds up to 5 mph shifting to the south after midnight. .TUESDAY...Mostly sunny. A 20 percent chance of rain showers in the afternoon. Highs in the mid 60s. South winds up to 5 mph shifting to the west in the afternoon. .TUESDAY NIGHT...Mostly cloudy with a 30 percent chance of rain showers in the evening, then partly cloudy after midnight. Lows in the upper 30s. West winds up to 10 mph. .WEDNESDAY...Partly sunny. Chance of rain showers and slight chance of thunderstorms in the afternoon. Highs in the upper 50s. West winds up to 5 mph shifting to the northwest in the afternoon. Chance of precipitation 40 percent. .WEDNESDAY NIGHT...Rain showers and slight chance of thunderstorms in the evening, then rain likely after midnight. Lows in the mid 30s. Northwest winds 5 to 15 mph. Chance of precipitation 80 percent. .THURSDAY...Partly sunny. A 50 percent chance of rain in the morning. Highs in the mid 60s. .THURSDAY NIGHT THROUGH FRIDAY NIGHT...Partly cloudy. Lows in the upper 30s. Highs in the upper 60s. .SATURDAY...Sunny. Highs in the mid 70s. .SATURDAY NIGHT THROUGH MEMORIAL DAY...Partly cloudy. Lows in the mid 40s. Highs in the upper 70s. && TEMPERATURE / PRECIPITATION Helena 30 65 38 60 / 10 30 30 40 $$ MTZ320-191000- Big Belt, Bridger and Castle Mountains- Including the cities of Trident, Maudlow, Battle Ridge Pass, Bozeman Pass, and Deep Creek Pass 336 PM MDT Mon May 18 2026 .TONIGHT...Mostly clear. Lows 22 to 28. North winds up to 10 mph shifting to the southwest after midnight. Gusts up to 25 mph. .TUESDAY...Not as cool. Mostly sunny. A 20 percent chance of rain showers in the afternoon. Highs 48 to 58. West winds 5 to 15 mph with gusts to around 30 mph. .TUESDAY NIGHT...Mostly cloudy with a 20 percent chance of rain showers in the evening, then partly cloudy after midnight. Lows in the mid 30s. West winds up to 10 mph with gusts to around 25 mph. .WEDNESDAY...Partly sunny. Chance of rain showers and slight chance of thunderstorms in the afternoon. Highs 46 to 54. West winds up to 15 mph with gusts to around 30 mph. Chance of precipitation 50 percent. .WEDNESDAY NIGHT...Rain showers and slight chance of thunderstorms in the evening, then rain and snow likely after midnight. Light snow accumulations. Lows in the mid 30s. Northwest winds 5 to 15 mph with gusts to around 30 mph. Chance of precipitation 90 percent. .THURSDAY...Partly sunny. Chance of rain and snow in the morning, then slight chance of thunderstorms and snow showers in the afternoon. Highs 46 to 56. Chance of precipitation 50 percent. .THURSDAY NIGHT THROUGH FRIDAY NIGHT...Partly cloudy. Lows in the mid 30s. Highs 53 to 63. .SATURDAY...Warmer, sunny. Highs 62 to 70. .SATURDAY NIGHT THROUGH SUNDAY NIGHT...Partly cloudy. Lows in the mid 40s. Highs 65 to 75. .MEMORIAL DAY...Mostly sunny. A 20 percent chance of thunderstorms in the afternoon. Highs 66 to 76. $$ MTZ321-191000- Meagher County Valleys- Including the cities of Martinsdale, Checkerboard, Ringling, and White Sulphur Springs 336 PM MDT Mon May 18 2026 .TONIGHT...Partly cloudy. Lows in the mid 20s. North winds up to 10 mph shifting to the southeast after midnight. .TUESDAY...Mostly sunny. A 20 percent chance of rain showers in the afternoon. Highs in the upper 50s. West winds up to 15 mph. .TUESDAY NIGHT...Mostly cloudy with a 20 percent chance of rain showers in the evening, then partly cloudy after midnight. Lows in the mid 30s. West winds up to 10 mph. Gusts up to 25 mph in the evening. .WEDNESDAY...Partly sunny. Chance of rain showers and slight chance of thunderstorms in the afternoon. Highs in the mid 50s. West winds up to 5 mph increasing to 5 to 15 mph in the afternoon. Chance of precipitation 50 percent. .WEDNESDAY NIGHT...Rain showers and slight chance of thunderstorms in the evening, then rain and snow likely after midnight. Lows in the mid 30s. North winds up to 15 mph. Chance of precipitation 90 percent. .THURSDAY...Partly sunny. Chance of rain and snow in the morning, then slight chance of thunderstorms in the afternoon. Highs in the mid 50s. Chance of precipitation 50 percent. .THURSDAY NIGHT THROUGH FRIDAY NIGHT...Partly cloudy. Lows in the mid 30s. Highs in the lower 60s. .SATURDAY...Sunny. Highs in the upper 60s. .SATURDAY NIGHT THROUGH SUNDAY NIGHT...Partly cloudy. Lows in the lower 40s. Highs in the lower 70s. .MEMORIAL DAY...Mostly sunny. Slight chance of rain in the morning, then slight chance of thunderstorms in the afternoon. Highs in the mid 70s. Chance of precipitation 20 percent. $$ MTZ322-191000- Elkhorn and Boulder Mountains- Including the cities of Montana City, Clancy, Boulder, Corbin, Wickes, Elk Park Pass, and Homestake Pass 336 PM MDT Mon May 18 2026 .TONIGHT...Partly cloudy. Lows 23 to 29. Northwest winds up to 5 mph with gusts to around 20 mph shifting to the west after midnight. .TUESDAY...Not as cool. Mostly sunny. Chance of rain showers and slight chance of snow showers in the afternoon. Highs 48 to 58. West winds up to 10 mph. Chance of precipitation 40 percent. .TUESDAY NIGHT...Mostly cloudy with a 40 percent chance of rain showers and snow showers in the evening, then partly cloudy after midnight. Lows 31 to 37. West winds up to 10 mph. .WEDNESDAY...Partly sunny. Chance of rain showers and slight chance of thunderstorms in the afternoon. Highs 47 to 55. West winds up to 10 mph. Chance of precipitation 40 percent. .WEDNESDAY NIGHT...Rain showers and slight chance of thunderstorms in the evening, then rain and snow likely after midnight. Light snow accumulations. Lows 30 to 36. Northwest winds 5 to 15 mph with gusts to around 40 mph. Chance of precipitation 90 percent. .THURSDAY...Partly sunny. A 50 percent chance of snow and rain in the morning. Highs 48 to 58. .THURSDAY NIGHT THROUGH FRIDAY NIGHT...Partly cloudy. Lows 31 to 41. Highs 54 to 64. .SATURDAY THROUGH SUNDAY NIGHT...Partly cloudy. Highs 61 to 75. Lows 40 to 47. .MEMORIAL DAY...Mostly sunny. A 20 percent chance of thunderstorms in the afternoon. Highs 65 to 75. $$ MTZ323-191000- Canyon Ferry Area- Including the cities of Toston, Townsend, and Winston 336 PM MDT Mon May 18 2026 .TONIGHT...Partly cloudy. Lows around 30. North winds up to 5 mph shifting to the south after midnight. .TUESDAY...Mostly sunny. A 20 percent chance of rain showers in the afternoon. Highs in the lower 60s. South winds up to 10 mph shifting to the northwest in the afternoon. .TUESDAY NIGHT...Mostly cloudy with a 40 percent chance of rain showers in the evening, then partly cloudy after midnight. Lows in the upper 30s. West winds up to 10 mph. .WEDNESDAY...Partly sunny. Chance of rain showers and slight chance of thunderstorms in the afternoon. Highs in the upper 50s. Southwest winds up to 5 mph shifting to the northwest in the afternoon. Chance of precipitation 40 percent. .WEDNESDAY NIGHT...Rain showers and slight chance of thunderstorms in the evening, then rain likely after midnight. Lows in the upper 30s. North winds 5 to 15 mph with gusts to around 35 mph. Chance of precipitation 80 percent. .THURSDAY...Partly sunny. A 50 percent chance of rain in the morning. Highs around 60. .THURSDAY NIGHT THROUGH FRIDAY NIGHT...Partly cloudy. Lows around 40. Highs in the mid 60s. .SATURDAY...Sunny. Highs in the lower 70s. .SATURDAY NIGHT THROUGH MEMORIAL DAY...Partly cloudy. Lows in the upper 40s. Highs in the upper 70s. $$ MTZ324-191000- Missouri Headwaters- Including the cities of Harrison, Three Forks, Willow Creek, Pony, and Whitehall 336 PM MDT Mon May 18 2026 .TONIGHT...Partly cloudy. Lows in the upper 20s. North winds up to 5 mph shifting to the southwest after midnight. .TUESDAY...Mostly sunny. A 20 percent chance of rain showers in the afternoon. Highs in the lower 60s. West winds up to 10 mph. .TUESDAY NIGHT...Mostly cloudy with a 20 percent chance of rain showers in the evening, then partly cloudy after midnight. Lows in the mid 30s. West winds up to 10 mph. .WEDNESDAY...Partly sunny. A 20 percent chance of thunderstorms in the afternoon. Highs in the upper 50s. West winds up to 10 mph. .WEDNESDAY NIGHT...Rain showers and slight chance of thunderstorms in the evening, then rain after midnight. Lows in the mid 30s. North winds 5 to 10 mph with gusts to around 30 mph. Chance of precipitation 90 percent. .THURSDAY...Partly sunny. Chance of rain and slight chance of snow in the morning, then slight chance of thunderstorms in the afternoon. Highs in the upper 50s. Chance of precipitation 50 percent. .THURSDAY NIGHT THROUGH FRIDAY NIGHT...Partly cloudy. Lows in the upper 30s. Highs in the mid 60s. .SATURDAY...Sunny. Highs in the mid 70s. .SATURDAY NIGHT...Partly cloudy. Lows in the mid 40s. .SUNDAY...Sunny. Highs in the upper 70s. .SUNDAY NIGHT AND MEMORIAL DAY...Partly cloudy. Lows in the mid 40s. Highs in the upper 70s. $$ MTZ325-191000- Madison River Valley- Including the cities of Cameron, Ennis, Jeffers, McAllister, and Norris 336 PM MDT Mon May 18 2026 .TONIGHT...Mostly clear. Lows in the mid 20s. North winds up to 10 mph with gusts to around 25 mph shifting to the south after midnight. .TUESDAY...Not as cool. Mostly sunny. A 20 percent chance of rain showers in the afternoon. Highs in the upper 50s. South winds up to 10 mph shifting to the west in the afternoon. .TUESDAY NIGHT...Not as cool. Mostly cloudy. A 40 percent chance of rain showers in the evening. Lows in the mid 30s. South winds up to 10 mph. .WEDNESDAY...Mostly sunny. A 20 percent chance of thunderstorms in the afternoon. Highs in the upper 50s. South winds up to 10 mph shifting to the west in the afternoon. .WEDNESDAY NIGHT...Rain showers and slight chance of thunderstorms in the evening, then rain after midnight. Lows in the mid 30s. North winds up to 10 mph. Chance of precipitation 90 percent. .THURSDAY...Partly sunny. Rain and snow likely in the morning, then slight chance of thunderstorms and snow showers in the afternoon. Highs in the upper 50s. Chance of precipitation 70 percent. .THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows in the mid 30s. Highs in the mid 60s. .FRIDAY NIGHT AND SATURDAY...Partly cloudy. Lows in the upper 30s. Highs in the lower 70s. .SATURDAY NIGHT...Mostly cloudy in the evening then becoming partly cloudy. Lows in the mid 40s. .SUNDAY...Sunny. Highs in the upper 70s. .SUNDAY NIGHT AND MEMORIAL DAY...Breezy. Partly cloudy. Lows in the upper 40s. Highs in the upper 70s. $$ MTZ326-191000- Gallatin Valley- Including the cities of Bozeman and Gallatin Gateway 336 PM MDT MonMay 18 2026 .TONIGHT...Mostly clear. Lows in the mid 20s. Northeast winds up to 5 mph shifting to the south after midnight. .TUESDAY...Not as cool. Mostly sunny. Highs in the lower 60s. South winds up to 5 mph shifting to the west in the afternoon. .TUESDAY NIGHT...Not as cool. Mostly cloudy with a 20 percent chance of rain showers in the evening, then partly cloudy after midnight. Lows in the mid 30s. East winds up to 5 mph shifting to the south after midnight. .WEDNESDAY...Partly sunny. A 20 percent chance of thunderstorms in the afternoon. Highs in the upper 50s. Southwest winds up to 5 mph shifting to the west in the afternoon. .WEDNESDAY NIGHT...Rain showers and slight chance of thunderstorms in the evening, then rain after midnight. Lows in the mid 30s. Northwest winds up to 10 mph. Chance of precipitation 90 percent. .THURSDAY...Partly sunny. Rain and snow likely in the morning, then chance of rain showers and slight chance of thunderstorms in the afternoon. Highs in the upper 50s. Chance of precipitation 70 percent. .THURSDAY NIGHT THROUGH FRIDAY NIGHT...Partly cloudy. Lows in the upper 30s. Highs in the mid 60s. .SATURDAY...Sunny. Highs in the mid 70s. .SATURDAY NIGHT...Partly cloudy. Lows in the mid 40s. .SUNDAY...Sunny. Highs in the upper 70s. .SUNDAY NIGHT AND MEMORIAL DAY...Partly cloudy. Lows in the mid 40s. Highs around 80. && TEMPERATURE / PRECIPITATION Bozeman Airport 24 62 33 60 / 0 0 30 20 Bozeman MSU 25 60 36 58 / 0 0 20 20 $$ MTZ330-191000- Gallatin and Madison County Mountains and Centennial Mountains- Including the cities of Big Sky, West Yellowstone, Targhee Pass, and Raynolds Pass 336 PM MDT Mon May 18 2026 .TONIGHT...Mostly clear. Lows 16 to 22. North winds up to 10 mph with gusts to around 30 mph shifting to the southwest after midnight. .TUESDAY...Not as cool. Mostly sunny. A 20 percent chance of snow showers in the afternoon. Highs 44 to 54. West winds up to 15 mph. .TUESDAY NIGHT...Mostly cloudy with a 20 percent chance of rain showers and snow showers in the evening, then partly cloudy after midnight. Lows 27 to 33. Southwest winds up to 10 mph with gusts to around 25 mph. .WEDNESDAY...Partly sunny. Chance of rain showers, snow showers and slight chance of thunderstorms in the afternoon. Highs 43 to 53. Southwest winds up to 15 mph. Gusts up to 30 mph in the afternoon. Chance of precipitation 50 percent. .WEDNESDAY NIGHT...Rain showers, snow and slight chance of thunderstorms in the evening, then snow and rain after midnight. Light snow accumulations. Snow level above 8000 feet. Lows 29 to 35. Northwest winds up to 10 mph with gusts to around 25 mph. Chance of precipitation near 100 percent. .THURSDAY...Partly sunny. Snow likely and chance of rain in the morning, then slight chance of thunderstorms and snow showers in the afternoon. Light snow accumulations. Highs 43 to 53. Chance of precipitation 70 percent. .THURSDAY NIGHT THROUGH FRIDAY NIGHT...Partly cloudy. Lows 27 to 37. Highs 49 to 61. .SATURDAY AND SATURDAY NIGHT...Partly cloudy. Highs 58 to 68. Lows 36 to 42. .SUNDAY...Sunny. Highs 61 to 73. .SUNDAY NIGHT AND MEMORIAL DAY...Partly cloudy. Lows 39 to 45. Highs 64 to 74. && TEMPERATURE / PRECIPITATION West Yellowstone 15 54 25 54 / 0 10 20 20 $$ MTZ327-191000- Northwest Beaverhead County- Including the cities of Dewey, Wisdom, Wise River, Big Hole Pass, and Chief Joseph Pass 336 PM MDT Mon May 18 2026 .TONIGHT...Partly cloudy. Lows in the lower 20s. North winds up to 10 mph with gusts to around 25 mph shifting to the west after midnight. .TUESDAY...Not as cool. Mostly sunny. A 20 percent chance of rain showers and snow showers in the afternoon. Highs 46 to 56. West winds up to 10 mph with gusts to around 25 mph. .TUESDAY NIGHT...Partly cloudy. A 20 percent chance of rain showers and snow showers in the evening. Lows around 30. West winds up to 10 mph with gusts to around 25 mph. .WEDNESDAY...Partly sunny. A 20 percent chance of thunderstorms in the afternoon. Highs 45 to 55. West winds up to 5 mph increasing to 5 to 15 mph in the afternoon. .WEDNESDAY NIGHT...Mostly cloudy. Chance of rain showers, snow and slight chance of thunderstorms in the evening, then snow likely and chance of rain after midnight. Snow level 7900 feet. Lows in the lower 30s. Northwest winds up to 15 mph with gusts to around 30 mph. Chance of precipitation 70 percent. .THURSDAY...Mostly sunny. Chance of snow and slight chance of rain in the morning. Highs 47 to 57. Chance of precipitation 40 percent. .THURSDAY NIGHT THROUGH FRIDAY NIGHT...Partly cloudy. Lows in the lower 30s. Highs 53 to 63. .SATURDAY AND SATURDAY NIGHT...Partly cloudy. Highs 59 to 69. Lows in the upper 30s. .SUNDAY...Sunny. Highs 62 to 72. .SUNDAY NIGHT...Partly cloudy. Lows 37 to 43. .MEMORIAL DAY...Mostly sunny. A 20 percent chance of thunderstorms in the afternoon. Highs 62 to 72. $$ MTZ328-191000- Beaverhead and Western Madison below 6000ft- Including the cities of Bannack, Dillon, Glen, and Waterloo 336 PM MDT Mon May 18 2026 .TONIGHT...Partly cloudy. Lows in the mid 20s. North winds up to 10 mph with gusts to around 25 mph shifting to the southwest after midnight. .TUESDAY...Not as cool. Mostly sunny. Highs 56 to 62. Southwest winds up to 10 mph. .TUESDAY NIGHT...Mostly cloudy with a 20 percent chance of rain showers in the evening, then partly cloudy after midnight. Lows in the mid 30s. West winds up to 10 mph. .WEDNESDAY...Partly sunny. Highs 55 to 61. West winds up to 10 mph. .WEDNESDAY NIGHT...Rain showers likely and slight chance of thunderstorms in the evening, then rain likely after midnight. Lows in the mid 30s. North winds 5 to 15 mph with gusts to around 30 mph. Chance of precipitation 70 percent. .THURSDAY...Partly sunny. Chance of rain and snow in the morning, then slight chance of thunderstorms in the afternoon. Highs 55 to 61. Chance of precipitation 50 percent. .THURSDAY NIGHT THROUGH FRIDAY NIGHT...Partly cloudy. Lows in the mid 30s. Highs 62 to 68. .SATURDAY AND SATURDAY NIGHT...Partly cloudy. Highs 69 to 75. Lows in the lower 40s. .SUNDAY...Sunny. Highs 73 to 79. .SUNDAY NIGHT AND MEMORIAL DAY...Breezy. Partly cloudy. Lows in the mid 40s. Highs 73 to 79. && TEMPERATURE / PRECIPITATION Dillon 25 61 33 61 / 0 10 20 10 $$ MTZ329-191000- Ruby Mountains and Southern Beaverhead Mountains- Including the city of Monida Pass 336 PM MDT Mon May 18 2026 .TONIGHT...Mostly clear. Lows in the lower 20s. North winds 5 to 10 mph with gusts to around 30 mph shifting to the southwest after midnight. .TUESDAY...Not as cool. Mostly sunny. Highs 47 to 55. West winds up to 15 mph. .TUESDAY NIGHT...Mostly cloudy with a 20 percent chance of rain showers and snow showers in the evening, then partly cloudy after midnight. Lows in the lower 30s. Southwest winds up to 10 mph. Gusts up to 25 mph in the evening. .WEDNESDAY...Mostly sunny. Highs 48 to 56. Southwest winds up to 5 mph shifting to the west 5 to 15 mph in the afternoon. .WEDNESDAY NIGHT...Rain and snow likely. Light snow accumulations. Lows in the lower 30s. Northwest winds 5 to 15 mph with gusts to around 35 mph. Chance of precipitation 70 percent. .THURSDAY...Partly sunny. Chance of snow and rain in the morning, then slight chance of thunderstorms and snow showers in the afternoon. Highs 48 to 56. Chance of precipitation 50 percent. .THURSDAY NIGHT THROUGH FRIDAY NIGHT...Partly cloudy. Lows in the lower 30s. Highs 54 to 62. .SATURDAY...Sunny. Highs 62 to 68. .SATURDAY NIGHT...Mostly cloudy in the evening then becoming partly cloudy. Lows around 40. .SUNDAY...Sunny. Highs 65 to 73. .SUNDAY NIGHT AND MEMORIAL DAY...Windy. Partly cloudy. Lows in the lower 40s. Highs 67 to 73. $$