FPUS55 KPIH 190242 ZFPPIH Zone Forecast Product FOR Idaho National Weather Service Pocatello ID 841 PM MDT Mon May 18 2026 This forecast may not be representative of the exact location you are interested in. For a site-specific forecast, please visit weather.gov/Pocatello and click the map on the main page. IDZ072-191000- Sawtooth/Stanley Basin- Including Stanley 841 PM MDT Mon May 18 2026 .TONIGHT...Partly cloudy. Lows 23 to 33. .TUESDAY...Increasing clouds. Highs 50 to 60. .TUESDAY NIGHT...Mostly cloudy in the evening then clearing. Lows 26 to 36. .WEDNESDAY...Mostly cloudy. Highs 52 to 62. .WEDNESDAY NIGHT...Partly cloudy with a slight chance of rain showers and snow showers. Lows 26 to 36. .THURSDAY...Mostly sunny with a slight chance of snow showers. Highs 58 to 68. .THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows 30 to 40. Highs 60 to 70. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 31 to 41. Highs 66 to 76. .SATURDAY NIGHT...Partly cloudy. Lows 35 to 45. .SUNDAY AND SUNDAY NIGHT...Mostly clear. Highs 68 to 78. Lows 36 to 46. .MEMORIAL DAY...Mostly sunny with a slight chance of rain. Highs 65 to 75. $$ IDZ073-191000- Sun Valley Region- Including Ketchum, Sun Valley, and Galena 841 PM MDT Mon May 18 2026 .TONIGHT...Partly cloudy. Lows 26 to 33. .TUESDAY...Increasing clouds. Highs 51 to 61. .TUESDAY NIGHT...Mostly cloudy in the evening then clearing. Lows 28 to 37. .WEDNESDAY...Mostly sunny. Highs 55 to 65. .WEDNESDAY NIGHT...Partly cloudy with a slight chance of snow showers. Lows 29 to 38. .THURSDAY...Mostly sunny with a slight chance of rain showers and snow showers. Highs 59 to 69. .THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows 31 to 41. Highs 61 to 71. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 33 to 43. Highs 67 to 77. .SATURDAY NIGHT...Partly cloudy. Lows 36 to 46. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Highs 70 to 80. Lows 38 to 48. $$ IDZ052-053-191000- Arco/Mud Lake Desert-Upper Snake River Plain- Including Mud Lake, INL, Craters of the Moon NM, Idaho Falls, Rexburg, and St. Anthony 841 PM MDT Mon May 18 2026 ...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM MDT TUESDAY... .TONIGHT...Mostly clear. Colder. Lows 24 to 32. Northeast winds 10 to 15 mph. .TUESDAY...Sunny. Highs 56 to 64. East winds up to 10 mph... shifting to southwest in the afternoon. .TUESDAY NIGHT...Partly cloudy. Lows 29 to 37. South winds 10 to 15 mph. .WEDNESDAY...Mostly sunny. Highs 60 to 67. Southwest winds around 10 mph. .WEDNESDAY NIGHT...Mostly cloudy with a chance of rain showers. Lows 35 to 42. Northwest winds 10 to 15 mph. Chance of precipitation 50 percent. .THURSDAY...Partly sunny with a chance of rain showers and a slight chance of thunderstorms. Highs 59 to 67. .THURSDAY NIGHT...Partly cloudy. Lows 32 to 40. .FRIDAY...Sunny. Highs 63 to 72. .FRIDAY NIGHT...Partly cloudy. Lows 35 to 43. .SATURDAY...Sunny. Highs 70 to 78. .SATURDAY NIGHT...Partly cloudy. Lows 39 to 48. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Highs 75 to 84. Lows 42 to 51. $$ IDZ051-191000- Shoshone/Lava Beds- Including Shoshone, Richfield, and Carey 841 PM MDT Mon May 18 2026 ...FROST ADVISORY REMAINS IN EFFECT FROM 3 AM TO 9 AM MDT TUESDAY... .TONIGHT...Mostly cloudy in the evening then clearing. Lows 28 to 36. North winds around 10 mph...shifting to northeast up to 10 mph after midnight. .TUESDAY...Sunny. Highs 60 to 67. East winds up to 10 mph... shifting to southwest in the afternoon. .TUESDAY NIGHT...Mostly clear. Lows 32 to 39. West winds 10 to 15 mph in the evening...becoming light and variable. .WEDNESDAY...Mostly sunny. Highs 64 to 71. West winds up to 10 mph. .WEDNESDAY NIGHT...Mostly cloudy with a slight chance of rain showers. Lows 37 to 44. West winds 10 to 15 mph. Chance of precipitation 20 percent. .THURSDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs 65 to 73. .THURSDAY NIGHT...Partly cloudy. Lows 35 to 43. .FRIDAY AND FRIDAY NIGHT...Mostly clear. Highs 68 to 75. Lows 37 to 45. .SATURDAY...Sunny. Highs 75 to 82. .SATURDAY NIGHT...Partly cloudy. Lows 41 to 50. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Highs 78 to 86. Lows 43 to 51. $$ IDZ056-057-191000- Southern Hills/Albion Mountains-Raft River Region- Including Albion, Almo, Malta, Rockland, and Holbrook 841 PM MDT Mon May 18 2026 .TONIGHT...Partly cloudy. Lows 28 to 37. North winds 10 to 15 mph...shifting to northwest after midnight. .TUESDAY...Sunny. Highs 58 to 65. Light and variable winds... becoming northwest around 10 mph in the afternoon. .TUESDAY NIGHT...Mostly clear. Lows 34 to 44. West winds around 10 mph...shifting to south up to 10 mph after midnight. .WEDNESDAY...Sunny. Highs 64 to 71. Southwest winds around 10 mph. .WEDNESDAY NIGHT...Mostly cloudy with a chance of rain showers. Lows 38 to 47. West winds around 10 mph. .THURSDAY...Partly sunny with a chance of rain showers and a slight chance of thunderstorms. Highs 63 to 71. .THURSDAY NIGHT...Mostly clear. Lows 37 to 47. .FRIDAY...Mostly sunny. Highs 67 to 75. .FRIDAY NIGHT...Mostly clear. Lows 40 to 50. .SATURDAY AND SATURDAY NIGHT...Partly cloudy. Highs 73 to 81. Lows 45 to 55. .SUNDAY...Sunny. Highs 77 to 85. .SUNDAY NIGHT...Partly cloudy. Lows 47 to 57. .MEMORIAL DAY...Sunny. Highs 77 to 85. $$ IDZ058-059-191000- Marsh and Arbon Highlands-Franklin/Eastern Oneida Region- Including Inkom, McCammon, Downey, Lava Hot Springs, Malad, Preston, and Thatcher 841 PM MDT Mon May 18 2026 .TONIGHT...Partly cloudy. Lows 24 to 34. .TUESDAY...Sunny. Highs 54 to 64. .TUESDAY NIGHT...Partly cloudy. Lows 30 to 40. .WEDNESDAY...Sunny. Highs 58 to 68. .WEDNESDAY NIGHT...Mostly cloudy with a slight chance of rain showers. Lows 35 to 45. .THURSDAY...Rain showers likely and a chance of thunderstorms. Highs 58 to 68. .THURSDAY NIGHT...Mostly clear. Lows 32 to 42. .FRIDAY AND FRIDAY NIGHT...Partly cloudy. Highs 62 to 72. Lows 36 to 46. .SATURDAY...Sunny. Highs 68 to 78. .SATURDAY NIGHT...Partly cloudy. Lows 40 to 50. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Highs 73 to 83. Lows 43 to 53. $$ IDZ054-191000- Lower Snake River Plain- Including Pocatello, Blackfoot, American Falls, Shelley, and Fort Hall 841 PM MDT Mon May 18 2026 ...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM MDT TUESDAY... .TONIGHT...Mostly clear. Colder. Lows 24 to 34. North winds 10 to 15 mph...shifting to northeast after midnight. .TUESDAY...Sunny. Highs 59 to 66. Northeast winds up to 10 mph... shifting to southwest around 10 mph in the afternoon. .TUESDAY NIGHT...Mostly clear. Lows 29 to 39. South winds 10 to 15 mph. .WEDNESDAY...Sunny. Highs 63 to 70. Southwest winds around 10 mph. .WEDNESDAY NIGHT...Mostly cloudy with a chance of rain showers. Lows 37 to 44. Southwest winds 10 to 15 mph. Chance of precipitation 50 percent. .THURSDAY...Partly sunny with a chance of showers and thunderstorms. Highs 62 to 69. .THURSDAY NIGHT...Partly cloudy. Lows 33 to 41. .FRIDAY...Sunny. Highs 65 to 73. .FRIDAY NIGHT...Partly cloudy. Lows 35 to 44. .SATURDAY...Sunny. Highs 72 to 79. .SATURDAY NIGHT...Partly cloudy. Lows 40 to 49. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Highs 75 to 83. Lows 42 to 52. $$ IDZ075-191000- Wood River Foothills- Including Hailey, Bellevue, and Picabo 841 PM MDT Mon May 18 2026 .TONIGHT...Mostly cloudy in the evening then clearing. Lows 29 to 36. Northeast winds up to 10 mph. .TUESDAY...Sunny. Highs 53 to 63. Southeast winds up to 10 mph... shifting to southwest in the afternoon. .TUESDAY NIGHT...Partly cloudy. Lows 31 to 39. West winds 10 to 15 mph...shifting to north after midnight. .WEDNESDAY...Mostly sunny. Highs 57 to 67. West winds 10 to 15 mph. .WEDNESDAY NIGHT...Partly cloudy with a slight chance of rain showers. Lows 33 to 42. Northwest winds 10 to 15 mph. .THURSDAY...Mostly sunny with a slight chance of rain showers. Highs 60 to 70. .THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows 35 to 44. Highs 62 to 72. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 37 to 46. Highs 68 to 78. .SATURDAY NIGHT...Partly cloudy. Lows 41 to 51. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Highs 72 to 82. Lows 42 to 52. $$ IDZ069-191000- Lost River Range- Including Borah Peak 841 PM MDT Mon May 18 2026 .TONIGHT...Partly cloudy. Lows 28 to 35. .TUESDAY...Mostly sunny. Highs 51 to 61. .TUESDAY NIGHT...Mostly cloudy in the evening then clearing. Lows 32 to 39. .WEDNESDAY...Mostly sunny with a slight chance of snow showers. Highs 54 to 64. .WEDNESDAY NIGHT...Rain showers, snow showers likely and a slight chance of thunderstorms. Lows 34 to 41. .THURSDAY...Mostly sunny with a chance of rain showers and snow showers. Highs 55 to 65. .THURSDAY NIGHT THROUGH FRIDAY NIGHT...Partly cloudy. Lows 34 to 44. Highs 58 to 68. .SATURDAY...Sunny. Highs 65 to 75. .SATURDAY NIGHT...Partly cloudy. Lows 42 to 49. .SUNDAY AND SUNDAY NIGHT...Mostly clear. Highs 69 to 79. Lows 44 to 51. .MEMORIAL DAY...Mostly sunny. Breezy. Highs 69 to 79. $$ IDZ063-064-191000- Caribou Range-Big Hole Mountains- Including Wayan, Swan Valley, and Victor 841 PM MDT Mon May 18 2026 .TONIGHT...Partly cloudy. Colder. Lows 22 to 32. .TUESDAY...Sunny. Not as cool. Highs 52 to 59. .TUESDAY NIGHT...Partly cloudy. Lows 27 to 37. .WEDNESDAY...Mostly sunny. Highs 57 to 64. .WEDNESDAY NIGHT...Mostly cloudy with a chance of rain showers and a slight chance of snow showers. Lows 32 to 39. .THURSDAY...Rain showers likely with pockets of snow showers and thunderstorms. Highs 56 to 63. .THURSDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows 30 to 38. .FRIDAY AND FRIDAY NIGHT...Partly cloudy. Highs 60 to 67. Lows 32 to 40. .SATURDAY...Sunny. Highs 67 to 74. .SATURDAY NIGHT...Partly cloudy. Lows 36 to 45. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Highs 72 to 82. Lows 38 to 48. $$ IDZ068-070-191000- Lost River Valley-Challis/Pahsimeroi Valleys- Including Howe, Arco, Mackay, Chilly, and Challis 841 PM MDT Mon May 18 2026 .TONIGHT...Partly cloudy. Lows 27 to 34. North winds around 10 mph in the evening...becoming light and variable. .TUESDAY...Mostly sunny. Highs 54 to 64. Light and variable winds...becoming southwest around 10 mph in the afternoon. .TUESDAY NIGHT...Mostly cloudy in the evening then clearing. Lows 31 to 38. West winds around 10 mph in the evening...becoming light and variable. .WEDNESDAY...Partly sunny. Highs 56 to 66. West winds up to 10 mph. .WEDNESDAY NIGHT...Mostly cloudy with a chance of rain showers and a slight chance of thunderstorms. Lows 32 to 39. Northwest winds 10 to 15 mph. .THURSDAY...Mostly sunny with a chance of rain showers and snow showers. Highs 58 to 68. .THURSDAY NIGHT THROUGH FRIDAY NIGHT...Partly cloudy. Lows 33 to 43. Highs 61 to 71. .SATURDAY...Sunny. Highs 68 to 78. .SATURDAY NIGHT...Partly cloudy. Lows 40 to 47. .SUNDAY AND SUNDAY NIGHT...Mostly clear. Highs 71 to 81. Lows 41 to 49. .MEMORIAL DAY...Mostly sunny. Highs 71 to 81. $$ IDZ066-067-191000- Centennial Mountains - Island Park-Beaverhead - Lemhi Highlands- Including Island Park, Kilgore, Dubois, Spencer, Edie School, and Small 841 PM MDT Mon May 18 2026 .TONIGHT...Mostly clear. Lows 24 to 32. .TUESDAY...Mostly sunny. Highs 51 to 59. .TUESDAY NIGHT...Mostly cloudy. Lows 27 to 37. .WEDNESDAY...Partly sunny with a slight chance of rain showers. Highs 54 to 62. .WEDNESDAY NIGHT...Rain showers and snow showers likely. Lows 29 to 39. .THURSDAY...Partly sunny with a chance of rain showers, snow showers and a slight chance of thunderstorms. Highs 54 to 62. .THURSDAY NIGHT THROUGH FRIDAY NIGHT...Partly cloudy. Lows 30 to 40. Highs 59 to 66. .SATURDAY...Sunny. Highs 66 to 73. .SATURDAY NIGHT...Partly cloudy. Lows 35 to 45. .SUNDAY...Sunny. Highs 71 to 79. .SUNDAY NIGHT...Partly cloudy. Lows 38 to 48. .MEMORIAL DAY...Sunny. Highs 71 to 79. $$ IDZ065-191000- Teton Valley- Including Ashton, Tetonia, and Driggs 841 PM MDT Mon May 18 2026 .TONIGHT...Mostly clear. Colder. Lows 22 to 29. .TUESDAY...Sunny. Highs 54 to 61. .TUESDAY NIGHT...Mostly cloudy in the evening then clearing. Lows 28 to 35. .WEDNESDAY...Mostly sunny. Highs 58 to 65. .WEDNESDAY NIGHT...Cloudy with a chance of rain showers. Lows 31 to 39. .THURSDAY...Rain showers likely and a chance of thunderstorms. Highs 56 to 63. .THURSDAY NIGHT...Partly cloudy. Lows 30 to 37. .FRIDAY...Sunny. Highs 61 to 68. .FRIDAY NIGHT...Partly cloudy. Lows 34 to 41. .SATURDAY...Sunny. Highs 68 to 75. .SATURDAY NIGHT...Partly cloudy with a slight chance of rain. Lows 38 to 45. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Highs 73 to 81. Lows 41 to 48. $$ IDZ062-191000- Blackfoot Mountains- Including Grace, Soda Springs, Henry, and Bone 841 PM MDT Mon May 18 2026 .TONIGHT...Mostly clear. Colder. Lows 22 to 32. .TUESDAY...Sunny. Highs 52 to 59. .TUESDAY NIGHT...Mostly clear. Lows 28 to 38. .WEDNESDAY...Mostly sunny. Highs 56 to 64. .WEDNESDAY NIGHT...Mostly cloudy with a chance of rain showers. Lows 33 to 43. .THURSDAY...Rain showers likely and a chance of thunderstorms. Highs 55 to 64. .THURSDAY NIGHT...Partly cloudy. Lows 30 to 40. .FRIDAY...Sunny. Highs 58 to 67. .FRIDAY NIGHT...Partly cloudy. Lows 33 to 43. .SATURDAY...Sunny. Highs 64 to 73. .SATURDAY NIGHT...Partly cloudy. Lows 38 to 48. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Highs 69 to 79. Lows 42 to 52. $$ IDZ060-191000- Bear River Range- Including Emigration Summit 841 PM MDT Mon May 18 2026 .TONIGHT...Decreasing clouds. Lows 28 to 35. .TUESDAY...Mostly sunny. Not as cool. Highs 50 to 57. .TUESDAY NIGHT...Partly cloudy. Lows 36 to 43. .WEDNESDAY...Mostly sunny. Highs 55 to 62. .WEDNESDAY NIGHT...Mostly cloudy with a slight chance of rain showers and snow showers. Lows 41 to 48. .THURSDAY...Rain showers, snow showers likely and a chance of thunderstorms. Highs 55 to 62. .THURSDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows 37 to 44. .FRIDAY...Mostly sunny. Highs 59 to 66. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 41 to 48. Highs 65 to 72. .SATURDAY NIGHT...Partly cloudy. Lows 45 to 53. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Highs 70 to 79. Lows 49 to 56. $$ IDZ061-191000- Bear Lake Valley- Including St. Charles, Montpelier, and Georgetown 841 PM MDT Mon May 18 2026 .TONIGHT...Mostly cloudy with a slight chance of rain showers and snow showers in the evening...then partly cloudy after midnight. Colder. Lows 22 to 32. .TUESDAY...Mostly sunny. Not as cool. Highs 50 to 57. .TUESDAY NIGHT...Mostly clear. Lows 26 to 36. .WEDNESDAY...Mostly sunny. Not as cool. Highs 56 to 63. .WEDNESDAY NIGHT...Mostly cloudy with a slight chance of rain showers. Lows 32 to 41. .THURSDAY...Rain showers with possible thunderstorms and snow showers. Highs 55 to 62. .THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows 29 to 38. Highs 59 to 66. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 32 to 41. Highs 64 to 73. .SATURDAY NIGHT...Partly cloudy. Lows 36 to 45. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Highs 69 to 79. Lows 39 to 47. $$ IDZ071-074-191000- Frank Church Wilderness-Big Lost Highlands/Copper Basin- Including Clayton and Copper Basin 841 PM MDT Mon May 18 2026 .TONIGHT...Partly cloudy. Lows 25 to 33. .TUESDAY...Increasing clouds. Highs 51 to 61. .TUESDAY NIGHT...Mostly cloudy in the evening then clearing. Lows 27 to 36. .WEDNESDAY...Partly sunny. Highs 52 to 62. .WEDNESDAY NIGHT...Mostly cloudy with a chance of rain showers, snow showers and a slight chance of thunderstorms. Lows 28 to 37. .THURSDAY...Mostly sunny with a chance of snow showers. Highs 57 to 67. .THURSDAY NIGHT THROUGH FRIDAY NIGHT...Partly cloudy. Lows 31 to 41. Highs 60 to 70. .SATURDAY...Sunny. Highs 65 to 75. .SATURDAY NIGHT...Partly cloudy. Lows 37 to 47. .SUNDAY AND SUNDAY NIGHT...Mostly clear. Highs 68 to 78. Lows 38 to 48. .MEMORIAL DAY...Mostly sunny. Breezy. Highs 66 to 76. $$ IDZ055-191000- Eastern Magic Valley- Including Burley, Rupert, Heyburn, and Oakley 841 PM MDT Mon May 18 2026 ...FROST ADVISORY REMAINS IN EFFECT FROM 3 AM TO 9 AM MDT TUESDAY... .TONIGHT...Partly cloudy. Lows 28 to 38. North winds around 10 mph...shifting to east up to 10 mph after midnight. .TUESDAY...Sunny. Highs 61 to 68. East winds up to 10 mph... shifting to west in the afternoon. .TUESDAY NIGHT...Mostly clear. Lows 34 to 44. Southwest winds around 10 mph. .WEDNESDAY...Sunny. Highs 65 to 72. Southwest winds around 10 mph. .WEDNESDAY NIGHT...Mostly cloudy with a chance of rain showers. Lows 38 to 48. Southwest winds 10 to 15 mph. Chance of precipitation 30 percent. .THURSDAY...Partly sunny with a chance of showers and thunderstorms. Highs 64 to 71. .THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows 36 to 46. Highs 68 to 75. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 39 to 49. Highs 75 to 82. .SATURDAY NIGHT...Partly cloudy. Lows 43 to 53. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Highs 78 to 86. Lows 46 to 56. $$ weather information on-line 24-hours a day www.weather.gov/pocatello