Grimes Pass, Idaho Weather
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Weather Forecast for Grimes Pass, Idaho : Boise County
Issued: 3:04 am MDT Sep 14, 2025 Latitude: 44.044617 Longitude: -115.8573372 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Monday Tuesday Wednesday Thursday Friday Saturday
60% chance of thunderstorms on Today 40% chance of thunderstorms on Tonight Fog on Monday Morning Fog on Tuesday Sunny on Wednesday Sunny on Thursday 20% chance of on Friday 20% chance of rain on Saturday
High: 75°F Low: 40°F High: 73°F High: 80°F High: 84°F High: 85°F High: 82°F High: 78°F
Low: 39°F Low: 42°F Low: 44°F Low: 47°F Low: 46°F  
Thunderstorms Thunderstorms Fog Morning Fog Sunny Sunny Partly Sunny Rain
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Current Conditions at
BOISE - (KBOI)
66°
Clear
as of 5:53 AM MDST
Rel. Humidity: 45%
Dew Point: 45°F
Visibility: 10 Miles
Pressure: 29.85 in.
Flight Rule: VFR
Wind Data
12 MPH
130° Southeast
Cloud Level(s): Clear
Current Conditions at
STANLEY RANGER STN - (KSNT)
34°
Clear
as of 5:51 AM MDST
Rel. Humidity: 93%
Dew Point: 32°F
Pressure: 30.08 in.
Wind Data
Calm
Current Conditions at
CALDWELL - (KEUL)
61°
Mostly Clear
as of 5:56 AM MDST
Rel. Humidity: 59%
Dew Point: 46°F
Visibility: 10 Miles
Pressure: 29.84 in.
Flight Rule: VFR
Wind Data
7 MPH
120° Southeast
Cloud Level(s): Few at 11000ft
Current Conditions at
ONTARIO - (KONO)
57°
Clear
as of 5:53 AM MDST
Rel. Humidity: 82%
Dew Point: 52°F
Visibility: 10 Miles
Pressure: 29.84 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
60% chance of thunderstorms Today Today... Showers likely and possibly a thunderstorm after noon. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 75. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 60%.
40% chance of thunderstorms Tonight Tonight... A chance of showers and thunderstorms. Areas of fog after midnight. Otherwise, partly cloudy, with a low around 40. West wind around 6 mph becoming calm in the evening. Chance of precipitation is 40%.
Fog on Monday Monday... Areas of fog before noon. Otherwise, sunny, with a high near 73. Light and variable wind.
Morning Fog on Monday Night Monday Night... Areas of fog after 3am. Otherwise, clear, with a low around 39. West northwest wind around 5 mph becoming calm in the evening.
Morning Fog on Tuesday Tuesday... Areas of fog before 9am. Otherwise, sunny, with a high near 80. Calm wind.
Clear on Tuesday Night Tuesday Night... Clear, with a low around 42.
Sunny on Wednesday Wednesday... Sunny, with a high near 84.
Clear on Wednesday Night Wednesday Night... Clear, with a low around 44.
Sunny on Thursday Thursday... Sunny, with a high near 85.
Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 47.
20% chance of Friday Friday... A 20 percent chance of showers. Partly sunny, with a high near 82.
20% chance of rain Friday Night Friday Night... A 20 percent chance of showers. Partly cloudy, with a low around 46.
20% chance of rain Saturday Saturday... A 20 percent chance of showers. Patchy fog. Otherwise, sunny, with a high near 78.
Current Radar Image


Sun Almanac for Grimes Pass, Idaho
Sunrise: 07:22 AM
Sunset: 7:55 PM
Civil Sunrise:06:53 AM
Civil Sunset: 8:24 PM
Nautical Sunrise: 06:19 AM
Nautical Sunset: 8:59 PM
Astro Sunrise: 05:43 AM
Astro Sunset: 9:34 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.