National Weather Service Forecast for: Grass Valley CA
Issued by: National Weather Service Sacramento, CA
Updated: 11:31 am PDT May 4, 2026
 
This
Afternoon
This Afternoon: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4pm. Mostly cloudy, with a high near 52. South southwest wind 3 to 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Showers
Likely
 Tonight

Tonight: Rain and possibly a thunderstorm before 2am, then a slight chance of rain between 2am and 3am. Low around 44. Light south southeast wind. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Showers then
Chance Rain
 Tuesday

Tuesday: Partly sunny, with a high near 59. Light and variable wind.
Partly Sunny
 Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 45. Light and variable wind.
Partly Cloudy
 Wednesday

Wednesday: Sunny, with a high near 70. Calm wind becoming west around 5 mph in the afternoon.
Sunny
 Wednesday
Night
Wednesday Night: Clear, with a low around 51.
Clear
 Thursday

Thursday: Sunny, with a high near 75.
Sunny
 Thursday
Night
Thursday Night: Mostly clear, with a low around 50.
Mostly Clear
 Friday

Friday: Sunny, with a high near 75.
Sunny
Hi 52 °F Lo 44 °F Hi 59 °F Lo 45 °F Hi 70 °F Lo 51 °F Hi 75 °F Lo 50 °F Hi 75 °F

 

This Afternoon
 
 A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4pm. Mostly cloudy, with a high near 52. South southwest wind 3 to 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
 
 Rain and possibly a thunderstorm before 2am, then a slight chance of rain between 2am and 3am. Low around 44. Light south southeast wind. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday
 
 Partly sunny, with a high near 59. Light and variable wind.
Tuesday Night
 
 Partly cloudy, with a low around 45. Light and variable wind.
Wednesday
 
 Sunny, with a high near 70. Calm wind becoming west around 5 mph in the afternoon.
Wednesday Night
 
 Clear, with a low around 51.
Thursday
 
 Sunny, with a high near 75.
Thursday Night
 
 Mostly clear, with a low around 50.
Friday
 
 Sunny, with a high near 75.
Friday Night
 
 Clear, with a low around 52.
Saturday
 
 Sunny, with a high near 81.
Saturday Night
 
 Clear, with a low around 56.
Sunday
 
 Sunny, with a high near 85.

 

Forecast from NOAA-NWS for Grass Valley CA.