National Weather Service Forecast for: Penn Valley CA
Issued by: National Weather Service Sacramento, CA
Updated: 1:51 pm PST Dec 17, 2025
 
Tonight

Tonight: A slight chance of showers before 4am, then a slight chance of showers after 5am. Patchy fog after 8pm. Otherwise, mostly cloudy, with a low around 41. Calm wind. Chance of precipitation is 20%.
Slight Chance
Showers and
Patchy Fog
 Thursday

Thursday: A 10 percent chance of showers after 4pm. Patchy fog before 10am. Otherwise, partly sunny, with a high near 56. Calm wind becoming south around 5 mph.
Patchy Fog
then Slight
Chance
Showers
 Thursday
Night
Thursday Night: Showers likely, mainly after 4am. Mostly cloudy, with a low around 46. Light southeast wind. Chance of precipitation is 60%.
Showers
Likely

 Friday

Friday: Showers. High near 52. South southeast wind 5 to 8 mph, with gusts as high as 18 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Showers

 Friday
Night
Friday Night: Showers. Low around 49. South southeast wind 5 to 7 mph. Chance of precipitation is 100%.
Showers

 Saturday

Saturday: Showers. High near 53. Chance of precipitation is 80%.
Showers

 Saturday
Night
Saturday Night: Showers, with thunderstorms also possible after 4am. Low around 50. Chance of precipitation is 90%.
Showers

 Sunday

Sunday: Showers and possibly a thunderstorm before 10am, then showers between 10am and 4pm, then showers and possibly a thunderstorm after 4pm. Some of the storms could produce heavy rainfall. Cloudy, with a high near 54.
Heavy Rain

 Sunday
Night
Sunday Night: Showers and possibly a thunderstorm. Cloudy, with a low around 49.
Showers
Lo 41 °F Hi 56 °F Lo 46 °F Hi 52 °F Lo 49 °F Hi 53 °F Lo 50 °F Hi 54 °F Lo 49 °F

 

Tonight
 
 A slight chance of showers before 4am, then a slight chance of showers after 5am. Patchy fog after 8pm. Otherwise, mostly cloudy, with a low around 41. Calm wind. Chance of precipitation is 20%.
Thursday
 
 A 10 percent chance of showers after 4pm. Patchy fog before 10am. Otherwise, partly sunny, with a high near 56. Calm wind becoming south around 5 mph.
Thursday Night
 
 Showers likely, mainly after 4am. Mostly cloudy, with a low around 46. Light southeast wind. Chance of precipitation is 60%.
Friday
 
 Showers. High near 52. South southeast wind 5 to 8 mph, with gusts as high as 18 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Friday Night
 
 Showers. Low around 49. South southeast wind 5 to 7 mph. Chance of precipitation is 100%.
Saturday
 
 Showers. High near 53. Chance of precipitation is 80%.
Saturday Night
 
 Showers, with thunderstorms also possible after 4am. Low around 50. Chance of precipitation is 90%.
Sunday
 
 Showers and possibly a thunderstorm before 10am, then showers between 10am and 4pm, then showers and possibly a thunderstorm after 4pm. Some of the storms could produce heavy rainfall. Cloudy, with a high near 54.
Sunday Night
 
 Showers and possibly a thunderstorm. Cloudy, with a low around 49.
Monday
 
 Showers. Mostly cloudy, with a high near 52.
Monday Night
 
 Showers. Mostly cloudy, with a low around 45.
Tuesday
 
 Showers likely. Mostly cloudy, with a high near 50.
Tuesday Night
 
 Showers. Cloudy, with a low around 44.
Wednesday
 
 Showers. Mostly cloudy, with a high near 49.

 

Forecast from NOAA-NWS for Penn Valley CA.