National Weather Service Forecast for: Grass Valley CA Issued by: National Weather Service Sacramento, CA

Updated: 11:31 pm PDT Oct 10, 2026

Overnight Low: 46 °F Sunday High: 67 °F Sunday Night Low: 45 °F Columbus Day High: 61 °F Monday Night Low: 42 °F Tuesday High: 67 °F Tuesday Night Low: 45 °F Wednesday High: 71 °F Wednesday Night Low: 50 °F Clear Sunny Mostly Clear Mostly Sunny Mostly Clear Sunny Clear Sunny Clear

 

Overnight	Clear, with a low around 46. Calm wind.
Sunday	Sunny, with a high near 67. Calm wind becoming west southwest around 5 mph in the afternoon.
Sunday Night	Mostly clear, with a low around 45. Southeast wind around 5 mph becoming calm in the evening.
Columbus Day	Mostly sunny, with a high near 61. Light and variable wind.
Monday Night	Mostly clear, with a low around 42. Light and variable wind.
Tuesday	Sunny, with a high near 67.
Tuesday Night	Clear, with a low around 45.
Wednesday	Sunny, with a high near 71.
Wednesday Night	Clear, with a low around 50.
Thursday	Sunny, with a high near 78.
Thursday Night	Clear, with a low around 55.
Friday	Sunny, with a high near 81.
Friday Night	Clear, with a low around 54.
Saturday	Sunny, with a high near 80.

 

Forecast from NOAA-NWS for Grass Valley CA.