National Weather Service Forecast for: Grass Valley CA
Issued by: National Weather Service Sacramento, CA
Updated: 2:01 am PDT Oct 6, 2026
 
Today

Today: Sunny, with a high near 91. Calm wind becoming west around 5 mph in the afternoon.
Sunny
 Tonight

Tonight: Clear, with a low around 62. Calm wind becoming east northeast around 5 mph.
Clear
 Wednesday

Wednesday: Sunny, with a high near 91. East wind around 5 mph becoming calm.
Sunny
 Wednesday
Night
Wednesday Night: Clear, with a low around 61. Calm wind becoming east northeast around 5 mph.
Clear
 Thursday

Thursday: Sunny, with a high near 91. East northeast wind around 6 mph becoming calm.
Sunny
 Thursday
Night
Thursday Night: Clear, with a low around 62.
Clear
 Friday

Friday: Sunny, with a high near 90.
Sunny
 Friday
Night
Friday Night: Clear, with a low around 60.
Clear
 Saturday

Saturday: Sunny, with a high near 75.
Sunny
Hi 91 °F Lo 62 °F Hi 91 °F Lo 61 °F Hi 91 °F Lo 62 °F Hi 90 °F Lo 60 °F Hi 75 °F

Heat Advisory
 

Today
 
 Sunny, with a high near 91. Calm wind becoming west around 5 mph in the afternoon.
Tonight
 
 Clear, with a low around 62. Calm wind becoming east northeast around 5 mph.
Wednesday
 
 Sunny, with a high near 91. East wind around 5 mph becoming calm.
Wednesday Night
 
 Clear, with a low around 61. Calm wind becoming east northeast around 5 mph.
Thursday
 
 Sunny, with a high near 91. East northeast wind around 6 mph becoming calm.
Thursday Night
 
 Clear, with a low around 62.
Friday
 
 Sunny, with a high near 90.
Friday Night
 
 Clear, with a low around 60.
Saturday
 
 Sunny, with a high near 75.
Saturday Night
 
 Mostly clear, with a low around 50.
Sunday
 
 Sunny, with a high near 67.
Sunday Night
 
 Mostly clear, with a low around 49.
Columbus Day
 
 Sunny, with a high near 67.

 

Forecast from NOAA-NWS for Grass Valley CA.