FPUS55 KBOI 200637 ZFPBOI Zone Forecasts for Southwest Idaho/Southeast Oregon National Weather Service Boise ID 1236 AM MDT Wed May 20 2026 Forecast Updated. Spot temperatures are for .TUESDAY THROUGH TUESDAY..., Wednesday, Wednesday night, and Thursday. IDZ011-201400- West Central Mountains- 1236 AM MDT Wed May 20 2026 .TODAY...Increasing clouds. Highs 54 to 69. .TONIGHT...Partly cloudy with a chance of rain showers in the evening, then mostly clear after midnight. Areas of fog after midnight. Chance of rain 30 percent. Lows 34 to 44. .THURSDAY...Areas of fog in the morning. Sunny. Highs 57 to 71. .THURSDAY NIGHT...Partly cloudy. Lows 36 to 46. .FRIDAY...Sunny. Highs 60 to 75. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 38 to 48. Highs 65 to 80. .SATURDAY NIGHT...Partly cloudy. Lows 42 to 52. .SUNDAY...Sunny. Highs 68 to 82. .SUNDAY NIGHT AND MEMORIAL DAY...Partly cloudy. Lows 43 to 53. Highs 65 to 79. .MONDAY NIGHT...Partly cloudy. A chance of rain showers, mainly after midnight. Chance of rain 30 percent. Lows 37 to 46. .TUESDAY...A chance of snow showers. Rain showers likely, mainly in the afternoon. Chance of precipitation 60 percent. Little snow accumulation expected. Much cooler with highs 49 to 61. && TEMPERATURE McCall 31 63 34 67 $$ = IDZ013-201400- Boise Mountains- 1236 AM MDT Wed May 20 2026 .TODAY...Mostly clear after midnight, then becoming mostly sunny this morning, then becoming partly sunny this afternoon. Highs 58 to 72. .TONIGHT...Mostly clear. Lows 29 to 44. .THURSDAY...Sunny. Highs 61 to 75. .THURSDAY NIGHT...Increasing clouds. Lows 31 to 46. .FRIDAY...Sunny. Highs 63 to 78. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 34 to 49. Highs 71 to 85. .SATURDAY NIGHT...Increasing clouds. Lows 39 to 54. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Highs 72 to 86. Lows 40 to 55. .MONDAY NIGHT...Partly cloudy. Lows 36 to 49. .TUESDAY...Partly cloudy. A chance of rain showers, mainly in the afternoon. Chance of rain 30 percent. Much cooler with highs 52 to 67. && TEMPERATURE Idaho City 31 71 36 74 $$ = IDZ028-201400- Camas Prairie- 1236 AM MDT Wed May 20 2026 .TODAY...Mostly clear after midnight, then becoming mostly sunny this morning, then becoming partly sunny this afternoon. Highs 63 to 68. Breezy. West winds up to 10 mph, increasing to 10 to 20 mph with gusts to 30 mph this afternoon. .TONIGHT...Partly cloudy in the evening, then clearing. Lows 32 to 37. Breezy. Northwest winds 10 to 20 mph. Gusts to 30 mph in the evening. .THURSDAY...Mostly sunny. Highs 64 to 69. Light winds in the morning, becoming west around 10 mph with gusts to 20 mph in the afternoon. .THURSDAY NIGHT...Partly cloudy. Lows 33 to 38. West winds 10 to 15 mph in the evening, shifting to northeast after midnight. .FRIDAY...Mostly sunny. Highs 68 to 73. Northeast winds around 10 mph in the morning, shifting to southwest in the afternoon. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 35 to 40. Highs 76 to 81. .SATURDAY NIGHT...Increasing clouds. Lows 40 to 45. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Highs 78 to 83. Lows 41 to 46. 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 64 to 69. Breezy. && TEMPERATURE Fairfield 28 67 32 67 $$ = IDZ033-201400- Upper Weiser River- 1236 AM MDT Wed May 20 2026 .TODAY...Partly cloudy. Highs 68 to 75. North winds up to 10 mph, becoming west this afternoon. .TONIGHT...Mostly clear. Lows 42 to 47. North winds 10 to 15 mph with gusts to 30 mph. .THURSDAY...Sunny. Highs 71 to 77. North winds 10 to 15 mph with gusts to 25 mph. .THURSDAY NIGHT...Partly cloudy. Lows 44 to 49. North winds up to 10 mph with gusts to 20 mph. .FRIDAY...Sunny. Highs 73 to 80. Northeast winds up to 10 mph in the morning, becoming light in the afternoon. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 47 to 52. Highs 79 to 86. .SATURDAY NIGHT...Partly cloudy. Lows 51 to 56. .SUNDAY...Sunny. Highs 82 to 88. .SUNDAY NIGHT AND MEMORIAL DAY...Partly cloudy. Lows 52 to 57. Highs 79 to 84. .MONDAY NIGHT...Partly cloudy. A slight chance of showers after midnight. Chance of rain 20 percent. Lows 44 to 49. Breezy. .TUESDAY...Partly cloudy. A chance of rain showers, mainly in the morning. Chance of rain 30 percent. Much cooler with highs 61 to 66. && TEMPERATURE Council 40 72 43 75 Cambridge 40 75 43 77 $$ = ORZ064-201400- Oregon Lower Treasure Valley- 1236 AM MDT Wed May 20 2026 /1136 PM PDT Tue May 19 2026/ .TODAY...Partly cloudy, then clearing. Highs 74 to 79. Northwest winds up to 10 mph. .TONIGHT...Partly cloudy. Lows 46 to 51. Breezy. Northwest winds 10 to 20 mph with gusts to 35 mph. .THURSDAY...Sunny. Highs 75 to 80. North winds 10 to 15 mph. .THURSDAY NIGHT...Partly cloudy. Lows 48 to 53. Northwest winds around 10 mph. .FRIDAY...Sunny. Highs 78 to 83. Northwest winds up to 10 mph in the morning, becoming light in the afternoon. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 49 to 54. Highs 85 to 90. .SATURDAY NIGHT...Partly cloudy. Lows 55 to 60. .SUNDAY...Sunny. Highs 87 to 92. .SUNDAY NIGHT AND MEMORIAL DAY...Partly cloudy. Lows 55 to 60. Highs 84 to 89. .MONDAY NIGHT...Partly cloudy. A slight chance of showers after midnight. Chance of rain 20 percent. Lows 46 to 51. Windy. .TUESDAY...Mostly sunny. Much cooler with highs 64 to 69. Breezy. && TEMPERATURE Ontario 43 77 48 78 $$ = IDZ012-201400- Lower Treasure Valley- 1236 AM MDT Wed May 20 2026 .TODAY...Increasing clouds. Highs 73 to 78. Northwest winds up to 10 mph. Gusts to 20 mph this afternoon. .TONIGHT...Partly cloudy in the evening, then becoming mostly clear. Lows 46 to 51. Northwest winds 10 to 15 mph with gusts to 25 mph. .THURSDAY...Sunny. Highs 74 to 79. Northwest winds 10 to 15 mph with gusts to 25 mph. .THURSDAY NIGHT...Partly cloudy. Lows 46 to 51. Northwest winds 10 to 15 mph. .FRIDAY...Sunny. Highs 77 to 82. Light winds. .FRIDAY NIGHT...Clear. Lows 48 to 53. .SATURDAY...Sunny. Highs 85 to 90. .SATURDAY NIGHT...Partly cloudy. Lows 53 to 58. .SUNDAY...Sunny. Highs 87 to 92. .SUNDAY NIGHT AND MEMORIAL DAY...Partly cloudy. Lows 54 to 59. Highs 85 to 90. .MONDAY NIGHT AND TUESDAY...Partly cloudy. A 20 percent chance of showers. Much cooler. Lows 46 to 51. Highs 65 to 70. Windy. && TEMPERATURE Caldwell 42 76 48 77 $$ = IDZ014-201400- Upper Treasure Valley- 1236 AM MDT Wed May 20 2026 .TODAY...Increasing clouds. Highs 73 to 78. Light winds, becoming northwest 10 to 15 mph with gusts to 25 mph this afternoon. .TONIGHT...Mostly clear. Lows 43 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 43 to 49. Northwest winds 10 to 15 mph. Gusts to 25 mph in the evening. .FRIDAY...Sunny. Highs 78 to 83. Southeast winds up to 10 mph in the morning, shifting to northwest around 10 mph in the afternoon. Gusts to 20 mph. .FRIDAY NIGHT...Clear. Lows 45 to 50. .SATURDAY...Sunny. Highs 85 to 90. .SATURDAY NIGHT...Partly cloudy. Lows 51 to 56. .SUNDAY...Partly cloudy. A slight chance of showers and thunderstorms in the afternoon. Chance of rain 20 percent. Highs 87 to 92..SUNDAY NIGHT...Increasing clouds. Lows 52 to 58. .MEMORIAL DAY...Sunny. Highs 88 to 93. .MONDAY NIGHT...Partly cloudy. Lows 45 to 50. Windy. .TUESDAY...Partly cloudy with a 20 percent chance of rain showers. Much cooler with highs 67 to 72. Windy. && TEMPERATURE Boise 43 74 48 76 Mountain Home 37 76 46 76 $$ = IDZ016-201400- Western Magic Valley- 1236 AM MDT Wed May 20 2026 .TODAY...Increasing clouds. Highs 69 to 74. South winds up to 10 mph, shifting to west with gusts to 25 mph this afternoon. .TONIGHT...Mostly cloudy in the evening, then partly cloudy with a slight chance of rain showers after midnight. Chance of rain 20 percent. Lows 41 to 46. West winds 10 to 15 mph with gusts to 25 mph. .THURSDAY...Sunny. Highs 67 to 73. West winds 10 to 15 mph. .THURSDAY NIGHT...Increasing clouds. Lows 40 to 45. West winds around 10 mph in the evening, shifting to southeast after midnight. .FRIDAY...Mostly sunny. Highs 74 to 79. East winds 10 to 15 mph in the morning, becoming light in the afternoon. .FRIDAY NIGHT...Clear. Lows 42 to 47. .SATURDAY...Sunny. Highs 81 to 86. .SATURDAY NIGHT...Partly cloudy. Lows 48 to 54. .SUNDAY...Partly cloudy. A slight chance of showers and thunderstorms in the afternoon. Chance of rain 20 percent. Highs 84 to 89. .SUNDAY NIGHT AND MEMORIAL DAY...Mostly clear. Lows 49 to 54. Highs 85 to 90. .MONDAY NIGHT...Partly cloudy. Lows 46 to 51. Windy. .TUESDAY...Partly cloudy. A slight chance of showers in the afternoon. Chance of rain 20 percent. Much cooler with highs 69 to 74. Windy. && TEMPERATURE Jerome 37 71 43 69 Twin Falls 38 70 44 69 $$ = IDZ029-201400- Owyhee Mountains- 1236 AM MDT Wed May 20 2026 .TODAY...Mostly clear after midnight, then becoming partly sunny this morning, then becoming mostly sunny this afternoon. Highs 65 to 70. .TONIGHT...Partly cloudy. Lows 40 to 48. .THURSDAY...Sunny. Highs 65 to 70. Breezy. .THURSDAY NIGHT...Partly cloudy. Lows 40 to 50. .FRIDAY...Sunny. Highs 70 to 75. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 43 to 53. Highs 77 to 82. .SATURDAY NIGHT...Partly cloudy. A slight chance of rain showers in the evening. Chance of rain 20 percent. Lows 48 to 58. .SUNDAY...Sunny. Highs 79 to 84. .SUNDAY NIGHT AND MEMORIAL DAY...Partly cloudy. Lows 49 to 59. Highs 78 to 83. .MONDAY NIGHT...Partly cloudy. A slight chance of rain showers after midnight. Chance of rain 20 percent. Lows 41 to 47. Breezy. .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 58 to 63. Breezy. $$ = IDZ015-201400- Southwest Highlands- 1236 AM MDT Wed May 20 2026 .TODAY...Mostly clear after midnight, then becoming mostly sunny this morning, then becoming partly sunny this afternoon. Highs 66 to 72. .TONIGHT...Decreasing clouds. Lows 40 to 45. .THURSDAY...Sunny. Highs 64 to 72. Windy. North winds around 25 mph in the afternoon. Gusts to 40 mph. .THURSDAY NIGHT...Increasing clouds. Lows 38 to 43. .FRIDAY...Sunny. Highs 71 to 78. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 42 to 47. Highs 78 to 86. .SATURDAY NIGHT...Partly cloudy. A slight chance of showers in the evening. Chance of rain 20 percent. Lows 46 to 53. .SUNDAY...Partly cloudy. A slight chance of showers and thunderstorms in the afternoon. Chance of rain 20 percent. Highs 80 to 87. .SUNDAY NIGHT AND MEMORIAL DAY...Partly cloudy. Lows 47 to 54. Highs 81 to 88. .MONDAY NIGHT...Partly cloudy. Lows 42 to 47. Windy. .TUESDAY...A slight chance of snow showers in the morning. Partly cloudy with a slight chance of rain showers. Chance of precipitation 20 percent. Much cooler with highs 64 to 69. Windy.$$ = IDZ030-201400- Southern Twin Falls County- 1236 AM MDT Wed May 20 2026 .TODAY...Increasing clouds. Highs 67 to 72. .TONIGHT...Mostly cloudy. A chance of rain showers after midnight. Chance of rain 30 percent. Lows 41 to 46. .THURSDAY...Sunny. Highs 65 to 70. Breezy. .THURSDAY NIGHT...Increasing clouds. Lows 39 to 44. .FRIDAY...Mostly sunny. Highs 71 to 76. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 43 to 48. Highs 79 to 84. .SATURDAY NIGHT...Partly cloudy. A slight chance of rain showers in the evening. Chance of rain 20 percent. Lows 49 to 54. .SUNDAY...Partly cloudy. A slight chance of rain showers and thunderstorms in the afternoon. Chance of rain 20 percent. Highs 82 to 87. .SUNDAY NIGHT...Partly cloudy in the evening, then clearing. Lows 49 to 55. .MEMORIAL DAY...Partly cloudy. A slight chance of showers in the afternoon. Chance of rain 20 percent. Highs 83 to 88. Breezy. .MONDAY NIGHT...Partly cloudy. Lows 45 to 50. Breezy. .TUESDAY...Partly cloudy. A slight chance of rain showers in the afternoon. Chance of rain 20 percent. Much cooler with highs 67 to 72. Windy. $$ = ORZ062-201400- Baker County- 1136 PM PDT Tue May 19 2026 .TODAY...Partly cloudy. Patchy fog this morning. Highs 66 to 73. Light winds, becoming northwest 10 to 15 mph with gusts to 25 mph this afternoon. .TONIGHT...Partly cloudy. Lows 36 to 46. Breezy. Northwest winds 10 to 20 mph. Gusts to 40 mph in the evening, decreasing to 25 mph after midnight. .THURSDAY...Sunny. Highs 68 to 75. Northwest winds 10 to 15 mph with gusts to 25 mph. .THURSDAY NIGHT...Partly cloudy. Lows 38 to 49. Breezy. North winds 10 to 20 mph with gusts to 30 mph in the evening, becoming northwest up to 10 mph after midnight. .FRIDAY...Sunny. Highs 72 to 80. Light winds. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 42 to 52. Highs 78 to 85. .SATURDAY NIGHT...Partly cloudy. Lows 45 to 55. .SUNDAY...Sunny. Highs 80 to 88. .SUNDAY NIGHT AND MEMORIAL DAY...Partly cloudy. Lows 45 to 55. Highs 74 to 83. Breezy. .MONDAY NIGHT...Partly cloudy. A chance of rain showers, mainly after midnight. Chance of rain 30 percent. Colder with lows 35 to 44. Windy. .TUESDAY...Partly cloudy. A chance of rain and snow showers, mainly in the morning. Chance of precipitation 30 percent. Much cooler with highs 56 to 63. Breezy. && TEMPERATURE Baker City 33 69 36 72 $$ = ORZ061-201400- Harney County- 1136 PM PDT Tue May 19 2026 .TODAY...Partly cloudy after midnight, then becoming partly sunny this morning, then becoming sunny this afternoon. Highs 66 to 73. Northwest winds up to 10 mph. .TONIGHT...Partly cloudy. Lows 36 to 44. North winds 10 to 15 mph with gusts to 25 mph. .THURSDAY...Sunny. Highs 67 to 74. North winds up to 10 mph. .THURSDAY NIGHT...Partly cloudy in the evening, then clearing. Lows 37 to 45. North winds up to 10 mph with gusts to 20 mph. .FRIDAY...Sunny. Highs 70 to 78. Light winds. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 41 to 49. Highs 75 to 84. .SATURDAY NIGHT...Partly cloudy. A slight chance of rain showers in the evening. Chance of rain 20 percent. Lows 44 to 51. .SUNDAY...Sunny. Highs 78 to 85. .SUNDAY NIGHT AND MEMORIAL DAY...Partly cloudy. Lows 44 to 52. Highs 74 to 82. Breezy. .MONDAY NIGHT AND TUESDAY...Partly cloudy. A slight chance of rain and snow showers. Chance of precipitation 20 percent. Much cooler. Lows 31 to 40. Highs 57 to 63. Windy. && TEMPERATURE Burns 33 73 36 74 $$ = ORZ063-201400- Malheur County- 1236 AM MDT Wed May 20 2026 /1136 PM PDT Tue May 19 2026/ .TODAY...Partly cloudy after midnight, then becoming partly sunny this morning, then becoming mostly sunny this afternoon. Highs 69 to 75. North winds up to 10 mph. .TONIGHT...Partly cloudy. Lows 40 to 49. Breezy. North winds 10 to 20 mph with gusts to 30 mph. .THURSDAY...Sunny. Highs 69 to 76. North winds 10 to 15 mph. .THURSDAY NIGHT...Partly cloudy. Lows 40 to 50. North winds 10 to 15 mph. .FRIDAY...Sunny. Highs 74 to 81. Light winds. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 43 to 52. Highs 81 to 87. .SATURDAY NIGHT...Partly cloudy. A slight chance of showers in the evening. Chance of rain 20 percent. Lows 47 to 57. .SUNDAY...Sunny. Highs 83 to 89. .SUNDAY NIGHT AND MEMORIAL DAY...Partly cloudy. Lows 48 to 57. Highs 79 to 87. Breezy. .MONDAY NIGHT AND TUESDAY...Partly cloudy. A 20 percent chance of rain showers. Much cooler. Lows 39 to 47. Highs 60 to 67. Windy. $$ =