National Weather Service Forecast for: Grass Valley CA
Issued by: National Weather Service Sacramento, CA
Updated: 1:21 am PST Dec 16, 2025
 
Today

Today: A 50 percent chance of showers, mainly after noon. Mostly cloudy, with a temperature falling to around 54 by 5pm. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Chance
Showers


 Tonight

Tonight: Showers likely, then showers and possibly a thunderstorm after 1am. Widespread dense fog, mainly between 9pm and 11pm. Low around 49. Calm wind becoming south southeast around 6 mph after midnight. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Showers
Likely and
Dense Fog
then Showers
and Patchy
Fog
 Wednesday

Wednesday: Showers and possibly a thunderstorm. High near 55. South wind around 6 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Showers


 Wednesday
Night
Wednesday Night: A 40 percent chance of showers, mainly before 10pm. Mostly cloudy, with a low around 44. Calm wind.
Chance
Showers


 Thursday

Thursday: A 30 percent chance of showers, mainly before 4pm. Partly sunny, with a high near 59. Light and variable wind.
Chance
Showers


 Thursday
Night
Thursday Night: A 30 percent chance of showers, mainly after 10pm. Mostly cloudy, with a low around 45.
Chance
Showers


 Friday

Friday: Showers likely, mainly after 10am. Mostly cloudy, with a high near 54. Chance of precipitation is 70%.
Showers
Likely


 Friday
Night
Friday Night: Showers. Cloudy, with a low around 48.
Showers


 Saturday

Saturday: Showers. Cloudy, with a high near 55.
Showers
Hi 61 °F⇓ Lo 49 °F Hi 55 °F Lo 44 °F Hi 59 °F Lo 45 °F Hi 54 °F Lo 48 °F Hi 55 °F

 

Today
 
 A 50 percent chance of showers, mainly after noon. Mostly cloudy, with a temperature falling to around 54 by 5pm. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Tonight
 
 Showers likely, then showers and possibly a thunderstorm after 1am. Widespread dense fog, mainly between 9pm and 11pm. Low around 49. Calm wind becoming south southeast around 6 mph after midnight. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
 
 Showers and possibly a thunderstorm. High near 55. South wind around 6 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
 
 A 40 percent chance of showers, mainly before 10pm. Mostly cloudy, with a low around 44. Calm wind.
Thursday
 
 A 30 percent chance of showers, mainly before 4pm. Partly sunny, with a high near 59. Light and variable wind.
Thursday Night
 
 A 30 percent chance of showers, mainly after 10pm. Mostly cloudy, with a low around 45.
Friday
 
 Showers likely, mainly after 10am. Mostly cloudy, with a high near 54. Chance of precipitation is 70%.
Friday Night
 
 Showers. Cloudy, with a low around 48.
Saturday
 
 Showers. Cloudy, with a high near 55.
Saturday Night
 
 Showers. Cloudy, with a low around 49.
Sunday
 
 Showers. Cloudy, with a high near 53.
Sunday Night
 
 Showers. Mostly cloudy, with a low around 48.
Monday
 
 Showers likely. Mostly cloudy, with a high near 54.

 

Forecast from NOAA-NWS for Grass Valley CA.