FPUS55 KBOI 201836 ZFPBOI Zone Forecasts for Southwest Idaho/Southeast Oregon National Weather Service Boise ID 1236 PM MDT Wed May 20 2026 Forecast Updated. Spot temperatures are for the rest of today, tonight, and Thursday. IDZ011-210200- West Central Mountains- 1236 PM MDT Wed May 20 2026 .REST OF TODAY...Partly sunny. Highs 54 to 69. .TONIGHT...Partly cloudy. Patchy fog after midnight. Lows 32 to 42. .THURSDAY...Patchy fog in the morning. Sunny. Highs 56 to 70. .THURSDAY NIGHT...Mostly cloudy. Lows 34 to 45. .FRIDAY...Mostly sunny. Highs 60 to 74. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 37 to 48. Highs 66 to 80. .SATURDAY NIGHT AND SUNDAY...Partly cloudy. Lows 43 to 53. Highs 66 to 81. .SUNDAY NIGHT...Increasing clouds. Lows 42 to 52. .MEMORIAL DAY...Mostly sunny. Highs 64 to 78. .MONDAY NIGHT...Mostly cloudy with a 20 percent chance of rain showers. Lows 38 to 47. .TUESDAY...Partly cloudy with a chance of rain and snow showers. Chance of precipitation 30 percent. Cooler with highs 51 to 63. && TEMPERATURE McCall 63 34 65 $$ = IDZ013-210200- Boise Mountains- 1236 PM MDT Wed May 20 2026 .REST OF TODAY...Partly sunny. Highs 58 to 72. .TONIGHT...Mostly clear. Lows 28 to 43. .THURSDAY...Sunny. Highs 60 to 74. .THURSDAY NIGHT...Increasing clouds. Lows 31 to 46. .FRIDAY...Mostly sunny. Highs 62 to 76. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 34 to 49. Highs 71 to 86. .SATURDAY NIGHT THROUGH MEMORIAL DAY...Mostly clear. Lows 40 to 55. Highs 71 to 85. .MONDAY NIGHT...Partly cloudy. Lows 36 to 51. .TUESDAY...Partly cloudy. A chance of rain showers, mainly in the afternoon. Chance of rain 30 percent. Cooler with highs 55 to 70. && TEMPERATURE Idaho City 71 34 73 $$ = IDZ028-210200- Camas Prairie- 1236 PM MDT Wed May 20 2026 .REST OF TODAY...Partly sunny. Highs 63 to 68. Breezy. West winds 10 to 20 mph with gusts to 30 mph. .TONIGHT...Decreasing clouds. Lows 32 to 37. Breezy. Northwest winds 10 to 20 mph. Gusts to 30 mph in the evening. .THURSDAY...Sunny. Highs 64 to 69. North winds up to 10 mph with gusts to 20 mph. .THURSDAY NIGHT...Increasing clouds. Lows 33 to 38. North winds 10 to 15 mph. .FRIDAY...Partly sunny in the morning, then clearing. Highs 67 to 72. East winds around 10 mph in the morning, shifting to south in the afternoon. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Warmer. Lows 34 to 40. Highs 77 to 82. .SATURDAY NIGHT THROUGH MEMORIAL DAY...Mostly clear. Lows 40 to 47. Highs 77 to 82. Breezy. .MONDAY NIGHT...Partly cloudy. Lows 39 to 44. Breezy. .TUESDAY...Partly cloudy. A slight chance of rain showers in the afternoon. Chance of rain 20 percent. Cooler with highs 66 to 71. Breezy. && TEMPERATURE Fairfield 67 32 67 $$ = IDZ033-210200- Upper Weiser River- 1236 PM MDT Wed May 20 2026 .REST OF TODAY...Mostly sunny. Highs 68 to 75. West winds up to 10 mph. .TONIGHT...Mostly clear. Lows 43 to 48. North winds 10 to 15 mph with gusts to 25 mph. .THURSDAY...Sunny. Highs 70 to 75. North winds 10 to 15 mph. .THURSDAY NIGHT...Mostly cloudy. Lows 43 to 48. North winds up to 10 mph with gusts to 20 mph. .FRIDAY...Sunny. Highs 72 to 78. Light winds. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 47 to 52. Highs 79 to 86. .SATURDAY NIGHT...Increasing clouds. Lows 52 to 57. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Highs 78 to 87. Lows 51 to 57. .MONDAY NIGHT...Mostly cloudy. A slight chance of showers after midnight. Chance of rain 20 percent. Lows 45 to 50. Breezy. .TUESDAY...Partly cloudy. A chance of showers, mainly in the morning. Chance of rain 30 percent. Much cooler with highs 63 to 69. && TEMPERATURE Council72 43 74 Cambridge 75 44 75 $$ = ORZ064-210200- Oregon Lower Treasure Valley- 1236 PM MDT Wed May 20 2026 /1136 AM PDT Wed May 20 2026/ .REST OF TODAY...Sunny. Highs 74 to 79. North winds up to 10 mph. .TONIGHT...Partly cloudy in the evening, then clearing. Lows 47 to 52. Breezy. North winds 10 to 20 mph with gusts to 35 mph. .THURSDAY...Sunny. Highs 75 to 80. North winds 10 to 15 mph. .THURSDAY NIGHT...Decreasing clouds. Lows 46 to 51. Northwest winds around 10 mph with gusts to 20 mph. .FRIDAY...Sunny. Highs 78 to 83. Light winds. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 48 to 53. Highs 85 to 90. .SATURDAY NIGHT...Increasing clouds. Lows 56 to 61. .SUNDAY AND SUNDAY NIGHT...Mostly clear. Highs 86 to 91. Lows 54 to 59. .MEMORIAL DAY...Mostly sunny. Highs 83 to 88. .MONDAY NIGHT AND TUESDAY...Mostly cloudy. A 20 percent chance of showers. Not as warm. Lows 47 to 52. Highs 66 to 71. Windy. && TEMPERATURE Ontario 77 48 78 $$ = IDZ012-210200- Lower Treasure Valley- 1236 PM MDT Wed May 20 2026 .REST OF TODAY...Sunny. Highs 73 to 78. Northwest winds 10 to 15 mph. .TONIGHT...Decreasing clouds. Lows 46 to 51. Northwest winds 10 to 15 mph with gusts to 25 mph. .THURSDAY...Sunny. Highs 74 to 79. Northwest winds 10 to 15 mph with gusts to 25 mph. .THURSDAY NIGHT...Mostly cloudy. Lows 45 to 50. Northwest winds up to 10 mph with gusts to 20 mph. .FRIDAY...Sunny. Highs 77 to 82. Light winds. .FRIDAY NIGHT...Clear. Lows 48 to 53. .SATURDAY...Sunny. Highs 85 to 90. .SATURDAY NIGHT...Increasing clouds. Lows 55 to 60. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Highs 84 to 91. Lows 53 to 58. .MONDAY NIGHT...Partly cloudy. Lows 46 to 51. Breezy. .TUESDAY...Partly cloudy with a 20 percent chance of showers. Much cooler with highs 68 to 73. Breezy. && TEMPERATURE Caldwell 76 47 76 $$ = IDZ014-210200- Upper Treasure Valley- 1236 PM MDT Wed May 20 2026 .REST OF TODAY...Mostly sunny. Highs 73 to 78. Northwest winds 10 to 15 mph with gusts to 25 mph. .TONIGHT...Increasing clouds. Lows 44 to 49. Breezy. Northwest winds 10 to 20 mph with gusts to 30 mph. .THURSDAY...Sunny. Highs 73 to 78. Windy. Northwest winds 15 to 25 mph with gusts to 40 mph. .THURSDAY NIGHT...Increasing clouds. Lows 42 to 47. Northwest winds 10 to 15 mph with gusts to 25 mph in the evening, shifting to east after midnight. .FRIDAY...Sunny. Highs 77 to 82. East winds 10 to 15 mph. .FRIDAY NIGHT...Clear. Lows 45 to 51. .SATURDAY...Sunny. Highs 86 to 91. .SATURDAY NIGHT...Increasing clouds. Lows 52 to 57. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Highs 86 to 92. Lows 51 to 57. .MONDAY NIGHT...Partly cloudy. Lows 46 to 51. Windy. .TUESDAY...Partly cloudy. A slight chance of rain showers in the afternoon. Chance of rain 20 percent. Much cooler with highs 69 to 74. Windy. && TEMPERATURE Boise 74 47 75 Mountain Home 76 45 75 $$ = IDZ016-210200- Western Magic Valley- 1236 PM MDT Wed May 20 2026 .REST OF TODAY...Partly sunny. Highs 69 to 74. West winds 10 to 15 mph with gusts to 25 mph. .TONIGHT...Partly cloudy. Lows 41 to 46. West winds 10 to 15 mph with gusts to 25 mph. .THURSDAY...Sunny. Highs 67 to 73. Northwest winds 10 to 15 mph with gusts to 25 mph. .THURSDAY NIGHT...Increasing clouds. Lows 41 to 46. West winds 10 to 15 mph in the evening, shifting to southeast after midnight. Gusts to 25 mph. .FRIDAY...Partly sunny in the morning, then clearing. Highs 73 to 78. East winds 10 to 15 mph in the morning, becoming light in the afternoon. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 43 to 48. Highs 82 to 87. .SATURDAY NIGHT THROUGH MEMORIAL DAY...Mostly clear. Lows 48 to 55. Highs 83 to 89. .MONDAY NIGHT...Partly cloudy. Lows 47 to 52. Breezy. .TUESDAY...Partly cloudy. A slight chance of showers in the afternoon. Chance of rain 20 percent. Much cooler with highs 70 to 75. Windy. && TEMPERATURE Jerome 71 43 69 Twin Falls 70 45 68 $$ = IDZ029-210200- Owyhee Mountains- 1236 PM MDT Wed May 20 2026 .REST OF TODAY...Mostly sunny. Highs 65 to 70. .TONIGHT...Partly cloudy. Lows 38 to 47. .THURSDAY...Sunny. Highs 64 to 69. Breezy. .THURSDAY NIGHT...Decreasing clouds. Lows 38 to 48. .FRIDAY...Sunny. Highs 70 to 75. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 43 to 53. Highs 78 to 83. .SATURDAY NIGHT...Partly cloudy. Lows 49 to 59. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Highs 77 to 83. Lows 48 to 58. .MONDAY NIGHT...Partly cloudy. Lows 42 to 49. Windy. .TUESDAY...A slight chance of snow showers in the morning. Partly cloudy with a slight chance of rain showers. Chance of precipitation 20 percent. Much cooler with highs 60 to 65. Breezy. $$ = IDZ015-210200- Southwest Highlands- 1236 PM MDT Wed May 20 2026 .REST OF TODAY...Partly sunny. Highs 66 to 72. .TONIGHT...Decreasing clouds. Lows 39 to 45. .THURSDAY...Sunny. Highs 64 to 71. Windy. North winds around 25 mph in the afternoon. Gusts to 35 mph. .THURSDAY NIGHT...Mostly cloudy. Lows 36 to 42. .FRIDAY...Mostly sunny. Highs 71 to 78. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 42 to 47. Highs 79 to 86. .SATURDAY NIGHT...Partly cloudy. Lows 46 to 54. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Highs 79 to 88. Lows 46 to 53. Breezy. .MONDAY NIGHT...Partly cloudy. Lows 42 to 47. Breezy. .TUESDAY...Partly cloudy. A chance of rain showers, mainly in the afternoon. Chance of rain 30 percent. Much cooler with highs 64 to 70. Windy. $$ = IDZ030-210200- Southern Twin Falls County- 1236 PM MDT Wed May 20 2026 .REST OF TODAY...Partly sunny. Highs 67 to 72. .TONIGHT...Mostly cloudy. Lows 41 to 46. .THURSDAY...Sunny. Highs 64 to 69. Breezy. .THURSDAY NIGHT...Partly cloudy. Lows 38 to 43. .FRIDAY...Partly sunny in the morning, then clearing. Highs 72 to 77. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 42 to 47. Highs 80 to 85. .SATURDAY NIGHT...Partly cloudy in the evening, then clearing. Lows 50 to 55. .SUNDAY...Partly cloudy. A slight chance of rain showers and thunderstorms in the afternoon. Chance of rain 20 percent. Highs 81 to 86. .SUNDAY NIGHT...Partly cloudy in the evening, then clearing. Lows 49 to 54. .MEMORIAL DAY...Sunny. Highs 83 to 88. Breezy. .MONDAY NIGHT...Partly cloudy. Lows 46 to 51. Breezy. .TUESDAY...Partly cloudy. A slight chance of rain showers and thunderstorms in the afternoon. Chance of rain 20 percent. Much cooler with highs 68 to 73. Breezy. $$ = ORZ062-210200- Baker County- 1136 AM PDT Wed May 20 2026 .REST OF TODAY...Mostly sunny. Highs 66 to 73. Northwest winds 10 to 15 mph with gusts to 25 mph. .TONIGHT...Partly cloudy. Lows 36 to 45. Breezy. Northwest winds 10 to 20 mph. Gusts to 40 mph in the evening, decreasing to 25 mph after midnight. .THURSDAY...Sunny. Highs 67 to 75. North winds 10 to 15 mph with gusts to 25 mph. .THURSDAY NIGHT...Decreasing clouds. Lows 37 to 47. Northwest winds 10 to 15 mph. Gusts to 30 mph in the evening. .FRIDAY...Sunny. Highs 72 to 79. Light winds. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 41 to 51. Highs 79 to 86. .SATURDAY NIGHT...Partly cloudy. Lows 45 to 55. .SUNDAY...Sunny. Highs 78 to 87. .SUNDAY NIGHT AND MEMORIAL DAY...Partly cloudy. Lows 45 to 55. Highs 73 to 82. Breezy. .MONDAY NIGHT...Mostly cloudy. A chance of rain showers, mainly after midnight. Patchy fog after midnight. Chance of rain 30 percent. Lows 36 to 46. Windy. .TUESDAY...A chance of snow showers in the morning. Patchy fog in the morning. Partly cloudy with a chance of rain showers. Chance of precipitation 30 percent. Much cooler with highs 57 to 66. Breezy. && TEMPERATURE Baker City 69 37 71 $$ = ORZ061-210200- Harney County- 1136 AM PDT Wed May 20 2026 .REST OF TODAY...Sunny. Highs 66 to 73. Northwest winds 10 to 15 mph. .TONIGHT...Partly cloudy. Lows 36 to 44. North winds 10 to 15 mph with gusts to 25 mph. .THURSDAY...Sunny. Highs 67 to 73. North winds up to 10 mph. .THURSDAY NIGHT...Partly cloudy in the evening, then clearing. Lows 37 to 44. North winds up to 10 mph with gusts to 20 mph. .FRIDAY...Sunny. Highs 71 to 78. Light winds. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 40 to 49. Highs 75 to 84. .SATURDAY NIGHT...Partly cloudy. Lows 44 to 51. .SUNDAY AND SUNDAY NIGHT...Mostly clear. Highs 77 to 84. Lows 43 to 51. .MEMORIAL DAY...Mostly sunny. Highs 73 to 81. Breezy. .MONDAY NIGHT...Partly cloudy with a 20 percent chance of rain showers. Lows 34 to 42. Windy. .TUESDAY...Partly cloudy. A chance of rain and snow showers, mainly in the morning. Chance of precipitation 30 percent. Much cooler with highs 56 to 62. Breezy. && TEMPERATURE Burns 73 37 73 $$ = ORZ063-210200- Malheur County- 1236 PM MDT Wed May 20 2026 /1136 AM PDT Wed May 20 2026/ .REST OF TODAY...Mostly sunny. Highs 69 to 75. Northwest winds 10 to 15 mph. .TONIGHT...Partly cloudy. Lows 39 to 49. Breezy. North winds 10 to 20 mph with gusts to 30 mph. .THURSDAY...Sunny. Highs 68 to 76. North winds 10 to 15 mph. .THURSDAY NIGHT...Decreasing clouds. Lows 38 to 48. North winds up to 10 mph with gusts to 20 mph. .FRIDAY...Sunny. Highs 74 to 80. Northeast winds up to 10 mph. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 42 to 52. Highs 81 to 88. .SATURDAY NIGHT...Partly cloudy. Lows 48 to 57. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Highs 78 to 88. Lows 47 to 56. Breezy. .MONDAY NIGHT...Partly cloudy. A slight chance of rain showers after midnight. Chance of rain 20 percent. Lows 40 to 49. Windy. .TUESDAY...Partly cloudy. A chance of rain showers, mainly in the morning. Chance of rain 30 percent. Much cooler with highs 62 to 68. Breezy. $$ =