National Weather Service Forecast for: Grass Valley CA
Issued by: National Weather Service Sacramento, CA
Updated: 1:21 pm PST Dec 4, 2025
 
Tonight

Tonight: Clear, with a steady temperature around 42. Calm wind.
Clear

 Friday

Friday: Sunny, with a high near 59. Light and variable wind.
Sunny

 Friday
Night
Friday Night: Patchy fog. Otherwise, mostly clear, with a low around 39. Calm wind.
Patchy Fog

 Saturday

Saturday: Patchy fog before 9am. Otherwise, sunny, with a high near 59. Calm wind.
Patchy Fog
then Sunny
 Saturday
Night
Saturday Night: Patchy fog between 9pm and midnight. Otherwise, mostly clear, with a low around 40. Calm wind.
Patchy Fog
then Mostly
Clear
 Sunday

Sunday: Mostly sunny, with a high near 59.
Mostly Sunny

 Sunday
Night
Sunday Night: Mostly clear, with a low around 40.
Mostly Clear

 Monday

Monday: Sunny, with a high near 61.
Sunny

 Monday
Night
Monday Night: Partly cloudy, with a low around 42.
Partly Cloudy
Lo 42 °F Hi 59 °F Lo 39 °F Hi 59 °F Lo 40 °F Hi 59 °F Lo 40 °F Hi 61 °F Lo 42 °F

 

Tonight
 
 Clear, with a steady temperature around 42. Calm wind.
Friday
 
 Sunny, with a high near 59. Light and variable wind.
Friday Night
 
 Patchy fog. Otherwise, mostly clear, with a low around 39. Calm wind.
Saturday
 
 Patchy fog before 9am. Otherwise, sunny, with a high near 59. Calm wind.
Saturday Night
 
 Patchy fog between 9pm and midnight. Otherwise, mostly clear, with a low around 40. Calm wind.
Sunday
 
 Mostly sunny, with a high near 59.
Sunday Night
 
 Mostly clear, with a low around 40.
Monday
 
 Sunny, with a high near 61.
Monday Night
 
 Partly cloudy, with a low around 42.
Tuesday
 
 Mostly sunny, with a high near 63.
Tuesday Night
 
 Partly cloudy, with a low around 44.
Wednesday
 
 Mostly sunny, with a high near 64.
Wednesday Night
 
 Mostly clear, with a low around 44.
Thursday
 
 Sunny, with a high near 64.

 

Forecast from NOAA-NWS for Grass Valley CA.