National Weather Service Forecast for: Grass Valley CA
Issued by: National Weather Service Sacramento, CA
Updated: 1:36 pm PST Dec 22, 2025
 
This
Afternoon
This Afternoon: Showers and possibly a thunderstorm before 4pm, then rain and possibly a thunderstorm after 4pm. High near 51. South southeast wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Showers
 Tonight

Tonight: Rain, mainly before 11pm. Low around 45. Calm wind. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Rain then
Chance Rain
 Tuesday

Tuesday: Rain, mainly after 4pm. High near 55. South wind 5 to 9 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Chance Rain
then Rain
 Tuesday
Night
Tuesday Night: Rain. The rain could be heavy at times. Low around 44. South southeast wind 14 to 18 mph, with gusts as high as 44 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
Heavy Rain
 Wednesday

Wednesday: Rain before 1pm, then showers and possibly a thunderstorm after 1pm. Some of the storms could produce heavy rainfall. High near 51. South southeast wind 10 to 14 mph, with gusts as high as 28 mph. Chance of precipitation is 100%.
Heavy Rain
 Wednesday
Night
Wednesday Night: Showers and possibly a thunderstorm before 1am, then rain after 1am. Low around 42. Chance of precipitation is 100%.
Showers
 Christmas
Day
Christmas Day: Rain before 10am, then showers and possibly a thunderstorm after 10am. Some of the storms could produce heavy rainfall. High near 47. Chance of precipitation is 100%.
Heavy Rain
 Thursday
Night
Thursday Night: Rain. Cloudy, with a low around 38.
Rain
 Friday

Friday: Rain. Cloudy, with a high near 44.
Rain
Hi 51 °F Lo 45 °F Hi 55 °F Lo 44 °F Hi 51 °F Lo 42 °F Hi 47 °F Lo 38 °F Hi 44 °F

Flood Watch
High Wind Watch
Flood Advisory
 

This Afternoon
 
 Showers and possibly a thunderstorm before 4pm, then rain and possibly a thunderstorm after 4pm. High near 51. South southeast wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
 
 Rain, mainly before 11pm. Low around 45. Calm wind. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday
 
 Rain, mainly after 4pm. High near 55. South wind 5 to 9 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
 
 Rain. The rain could be heavy at times. Low around 44. South southeast wind 14 to 18 mph, with gusts as high as 44 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
Wednesday
 
 Rain before 1pm, then showers and possibly a thunderstorm after 1pm. Some of the storms could produce heavy rainfall. High near 51. South southeast wind 10 to 14 mph, with gusts as high as 28 mph. Chance of precipitation is 100%.
Wednesday Night
 
 Showers and possibly a thunderstorm before 1am, then rain after 1am. Low around 42. Chance of precipitation is 100%.
Christmas Day
 
 Rain before 10am, then showers and possibly a thunderstorm after 10am. Some of the storms could produce heavy rainfall. High near 47. Chance of precipitation is 100%.
Thursday Night
 
 Rain. Cloudy, with a low around 38.
Friday
 
 Rain. Cloudy, with a high near 44.
Friday Night
 
 Rain likely, mainly before 10pm. Mostly cloudy, with a low around 32.
Saturday
 
 A slight chance of rain and snow. Mostly sunny, with a high near 50.
Saturday Night
 
 Mostly clear, with a low around 32.
Sunday
 
 Sunny, with a high near 52.
Sunday Night
 
 Partly cloudy, with a low around 34.
Monday
 
 Sunny, with a high near 54.

 

Forecast from NOAA-NWS for Grass Valley CA.