National Weather Service Forecast for: Alta Sierra CA
Issued by: National Weather Service Sacramento, CA
Updated: 1:36 pm PST Dec 22, 2025
 
Overnight

Overnight: A 30 percent chance of rain, mainly before 1am. Cloudy, with a steady temperature around 49. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Chance Rain
 Tuesday

Tuesday: Rain, mainly after 1pm. High near 56. Light southeast wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 23 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 45. South southeast wind 14 to 17 mph, with gusts as high as 41 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 13 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Heavy Rain
 Wednesday
Night
Wednesday Night: Showers and possibly a thunderstorm before 10pm, then rain after 10pm. Low around 43. South southeast wind around 14 mph, with gusts as high as 32 mph. 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. Low around 39. Chance of precipitation is 100%.
Rain
 Friday

Friday: Rain. Cloudy, with a high near 44.
Rain
 Friday
Night
Friday Night: Rain likely, mainly before 10pm. Mostly cloudy, with a low around 33.
Rain Likely
Lo 49 °F Hi 56 °F Lo 45 °F Hi 51 °F Lo 43 °F Hi 47 °F Lo 39 °F Hi 44 °F Lo 33 °F

Flood Watch
High Wind Watch
 

Overnight
 
 A 30 percent chance of rain, mainly before 1am. Cloudy, with a steady temperature around 49. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
 
 Rain, mainly after 1pm. High near 56. Light southeast wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 23 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 45. South southeast wind 14 to 17 mph, with gusts as high as 41 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 13 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Wednesday Night
 
 Showers and possibly a thunderstorm before 10pm, then rain after 10pm. Low around 43. South southeast wind around 14 mph, with gusts as high as 32 mph. 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. Low around 39. Chance of precipitation is 100%.
Friday
 
 Rain. Cloudy, with a high near 44.
Friday Night
 
 Rain likely, mainly before 10pm. Mostly cloudy, with a low around 33.
Saturday
 
 A slight chance of rain before 10am. 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 Alta Sierra CA.