National Weather Service Forecast for: Grass Valley CA
Issued by: National Weather Service Sacramento, CA
Updated: 1:20 pm PST Dec 5, 2025
 
Tonight

Tonight: Patchy fog after 3am. Otherwise, clear, with a low around 40. Calm wind.
Patchy Fog
 Saturday

Saturday: Widespread fog, mainly between 7am and 10am. Otherwise, sunny, with a high near 58. Calm wind.
Fog then
Sunny
 Saturday
Night
Saturday Night: Mostly clear, with a low around 41. Calm wind.
Mostly Clear
 Sunday

Sunday: Mostly sunny, with a high near 60. Calm wind.
Mostly Sunny
 Sunday
Night
Sunday Night: Mostly clear, with a low around 42. Calm wind.
Mostly Clear
 Monday

Monday: Sunny, with a high near 62.
Sunny
 Monday
Night
Monday Night: Partly cloudy, with a low around 43.
Partly Cloudy
 Tuesday

Tuesday: Mostly sunny, with a high near 64.
Mostly Sunny
 Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 45.
Partly Cloudy
Lo 40 °F Hi 58 °F Lo 41 °F Hi 60 °F Lo 42 °F Hi 62 °F Lo 43 °F Hi 64 °F Lo 45 °F

 

Tonight
 
 Patchy fog after 3am. Otherwise, clear, with a low around 40. Calm wind.
Saturday
 
 Widespread fog, mainly between 7am and 10am. Otherwise, sunny, with a high near 58. Calm wind.
Saturday Night
 
 Mostly clear, with a low around 41. Calm wind.
Sunday
 
 Mostly sunny, with a high near 60. Calm wind.
Sunday Night
 
 Mostly clear, with a low around 42. Calm wind.
Monday
 
 Sunny, with a high near 62.
Monday Night
 
 Partly cloudy, with a low around 43.
Tuesday
 
 Mostly sunny, with a high near 64.
Tuesday Night
 
 Partly cloudy, with a low around 45.
Wednesday
 
 Sunny, with a high near 65.
Wednesday Night
 
 Mostly clear, with a low around 45.
Thursday
 
 Sunny, with a high near 66.
Thursday Night
 
 Mostly clear, with a low around 45.
Friday
 
 Sunny, with a high near 66.

 

Forecast from NOAA-NWS for Grass Valley CA.