National Weather Service Forecast for: Grass Valley CA
Issued by: National Weather Service Sacramento, CA
Updated: 2:01 pm PDT Sep 12, 2026
 
Tonight

Tonight: Clear, with a low around 52. South wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 20 mph.
Clear
 Sunday

Sunday: Widespread haze between 9am and noon. Sunny, with a high near 73. Calm wind becoming west around 5 mph.
Haze then
Sunny
 Sunday
Night
Sunday Night: Clear, with a low around 52. Light and variable wind.
Clear
 Monday

Monday: Sunny, with a high near 81. East northeast wind around 6 mph becoming calm.
Sunny
 Monday
Night
Monday Night: Clear, with a low around 55. Light and variable wind.
Clear
 Tuesday

Tuesday: Sunny, with a high near 82.
Sunny
 Tuesday
Night
Tuesday Night: Clear, with a low around 56.
Clear
 Wednesday

Wednesday: Sunny, with a high near 82.
Sunny
 Wednesday
Night
Wednesday Night: Clear, with a low around 57.
Clear
Lo 52 °F Hi 73 °F Lo 52 °F Hi 81 °F Lo 55 °F Hi 82 °F Lo 56 °F Hi 82 °F Lo 57 °F

 

Tonight
 
 Clear, with a low around 52. South wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 20 mph.
Sunday
 
 Widespread haze between 9am and noon. Sunny, with a high near 73. Calm wind becoming west around 5 mph.
Sunday Night
 
 Clear, with a low around 52. Light and variable wind.
Monday
 
 Sunny, with a high near 81. East northeast wind around 6 mph becoming calm.
Monday Night
 
 Clear, with a low around 55. Light and variable wind.
Tuesday
 
 Sunny, with a high near 82.
Tuesday Night
 
 Clear, with a low around 56.
Wednesday
 
 Sunny, with a high near 82.
Wednesday Night
 
 Clear, with a low around 57.
Thursday
 
 Sunny, with a high near 85.
Thursday Night
 
 Mostly clear, with a low around 57.
Friday
 
 Sunny, with a high near 86.
Friday Night
 
 Mostly clear, with a low around 58.
Saturday
 
 Sunny, with a high near 84.

 

Forecast from NOAA-NWS for Grass Valley CA.