Grandjean, Idaho Weather
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Weather Forecast for Grandjean, Idaho : Custer County
Issued: 3:04 pm MDT Sep 13, 2025 Latitude: 44.1601828 Longitude: -115.167593 View on Google Maps

MouseOver for Detail Forecast
Overnight Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Mostly Clear on Overnight 60% chance of thunderstorms on Sunday 30% chance of thunderstorms on Monday Sunny on Tuesday Sunny on Wednesday Sunny on Thursday 20% chance of rain on Friday 30% chance of rain on Saturday
Low: 47°F High: 58°F High: 52°F High: 60°F High: 63°F High: 64°F High: 60°F High: 57°F
Low: 41°F Low: 42°F Low: 46°F Low: 48°F Low: 49°F Low: 47°F  
Mostly Clear Thunderstorms Thunderstorms Sunny Sunny Sunny Rain Rain
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Current Conditions at
STANLEY RANGER STN - (KSNT)
39°
Clear
as of 1:51 AM MDST
Rel. Humidity: 86%
Dew Point: 36°F
Pressure: 30.09 in.
Wind Data
3 MPH
190° South
Current Conditions at
CHALLIS - (KLLJ)
52°
Clear
as of 1:55 AM MDST
Rel. Humidity: 76%
Dew Point: 45°F
Visibility: 10 Miles
Pressure: 30.00 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
HAILEY - (KSUN)
50°
Clear
as of 2:35 AM MDST
Rel. Humidity: 76%
Dew Point: 43°F
Visibility: 10 Miles
Pressure: 30.05 in.
Flight Rule: VFR
Wind Data
8 MPH
300° Northwest
Cloud Level(s): Clear
Current Conditions at
MCCALL - (KMYL)
46°
Clear
as of 1:51 AM MDST
Rel. Humidity: 87%
Dew Point: 43°F
Visibility: 10 Miles
Pressure: 30.00 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Mostly Clear on Overnight Overnight... Mostly clear, with a low around 47. East wind 3 to 5 mph.
60% chance of thunderstorms Sunday Sunday... Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 58. Light and variable wind becoming southwest 5 to 10 mph in the morning. Chance of precipitation is 60%.
40% chance of thunderstorms Sunday Night Sunday Night... A chance of showers and thunderstorms. Mostly cloudy, with a low around 41. Southwest wind 5 to 10 mph becoming light west southwest after midnight. Chance of precipitation is 40%.
30% chance of thunderstorms Monday Monday... A chance of showers, with thunderstorms also possible after 3pm. Partly sunny, with a high near 52. Calm wind becoming northwest 5 to 7 mph in the afternoon. Chance of precipitation is 30%.
Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 42. Northwest wind around 7 mph becoming east northeast after midnight.
Sunny on Tuesday Tuesday... Sunny, with a high near 60.
Clear on Tuesday Night Tuesday Night... Clear, with a low around 46.
Sunny on Wednesday Wednesday... Sunny, with a high near 63.
Clear on Wednesday Night Wednesday Night... Clear, with a low around 48.
Sunny on Thursday Thursday... Sunny, with a high near 64.
Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 49.
20% chance of rain Friday Friday... A 20 percent chance of showers. Mostly sunny, with a high near 60.
20% chance of rain Friday Night Friday Night... A 20 percent chance of showers. Partly cloudy, with a low around 47.
30% chance of rain Saturday Saturday... A 30 percent chance of showers. Mostly sunny, with a high near 57.
Current Radar Image


Sun Almanac for Grandjean, Idaho
Sunrise: 07:19 AM
Sunset: 7:53 PM
Civil Sunrise:06:50 AM
Civil Sunset: 8:22 PM
Nautical Sunrise: 06:16 AM
Nautical Sunset: 8:56 PM
Astro Sunrise: 05:40 AM
Astro Sunset: 9:32 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.