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

Tonight: A chance of showers before 10pm, then a slight chance of showers after 3am. Patchy fog after 8pm. Otherwise, partly cloudy, with a low around 40. Calm wind. Chance of precipitation is 30%.
Chance
Showers and
Patchy Fog
 Thursday

Thursday: A 10 percent chance of showers after 4pm. Partly sunny, with a high near 57. Light and variable wind.
Mostly Sunny
then Slight
Chance
Showers
 Thursday
Night
Thursday Night: Showers likely, mainly after 4am. Mostly cloudy, with a low around 44. Calm wind. Chance of precipitation is 60%.
Showers
Likely

 Friday

Friday: Showers. High near 51. South southeast wind 3 to 7 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 48. South southeast wind 3 to 6 mph. Chance of precipitation is 100%.
Showers

 Saturday

Saturday: Showers. High near 54. Chance of precipitation is 80%.
Showers

 Saturday
Night
Saturday Night: Showers, with thunderstorms also possible after 4am. Low around 49. 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. Some of the storms could produce heavy rainfall. Cloudy, with a low around 47.
Heavy Rain
Lo 40 °F Hi 57 °F Lo 44 °F Hi 51 °F Lo 48 °F Hi 54 °F Lo 49 °F Hi 54 °F Lo 47 °F

 

Tonight
 
 A chance of showers before 10pm, then a slight chance of showers after 3am. Patchy fog after 8pm. Otherwise, partly cloudy, with a low around 40. Calm wind. Chance of precipitation is 30%.
Thursday
 
 A 10 percent chance of showers after 4pm. Partly sunny, with a high near 57. Light and variable wind.
Thursday Night
 
 Showers likely, mainly after 4am. Mostly cloudy, with a low around 44. Calm wind. Chance of precipitation is 60%.
Friday
 
 Showers. High near 51. South southeast wind 3 to 7 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Friday Night
 
 Showers. Low around 48. South southeast wind 3 to 6 mph. Chance of precipitation is 100%.
Saturday
 
 Showers. High near 54. Chance of precipitation is 80%.
Saturday Night
 
 Showers, with thunderstorms also possible after 4am. Low around 49. 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. Some of the storms could produce heavy rainfall. Cloudy, with a low around 47.
Monday
 
 Showers. Mostly cloudy, with a high near 52.
Monday Night
 
 Showers. Mostly cloudy, with a low around 44.
Tuesday
 
 Showers likely. Mostly cloudy, with a high near 51.
Tuesday Night
 
 Showers. Cloudy, with a low around 43.
Wednesday
 
 Showers. Mostly cloudy, with a high near 49.

 

Forecast from NOAA-NWS for Alta Sierra CA.