National Weather Service Forecast for: Fairfax CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 2:30 pm PST Dec 23, 2025
 
This
Afternoon
This Afternoon: Showers likely. Cloudy, with a high near 58. South wind around 16 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Showers
Likely
 Tonight

Tonight: Showers before 1am, then showers and possibly a thunderstorm between 1am and 4am, then showers after 4am. Low around 51. Breezy, with a south southeast wind 15 to 22 mph, with gusts as high as 49 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Showers and
Breezy
 Wednesday

Wednesday: Showers, with thunderstorms also possible after 10am. Some of the storms could be severe. High near 57. Southwest wind 7 to 10 mph becoming southeast in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Severe
T-Storms
 Wednesday
Night
Wednesday Night: Showers and possibly a thunderstorm. Some of the storms could be severe. Low around 50. Breezy, with a south wind 18 to 23 mph, with gusts as high as 44 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Severe
T-Storms
and Breezy
 Christmas
Day
Christmas Day: Showers and possibly a thunderstorm before 7am, then showers between 7am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 54. South wind around 18 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Showers

 Thursday
Night
Thursday Night: Showers and possibly a thunderstorm. Low around 48. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Showers

 Friday

Friday: Showers, with thunderstorms also possible after 1pm. High near 54. Chance of precipitation is 90%.
Showers

 Friday
Night
Friday Night: Showers likely and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms after 10pm. Mostly cloudy, with a low around 44.
Showers
Likely
 Saturday

Saturday: A chance of showers, mainly before 10am. Mostly sunny, with a high near 54.
Chance
Showers
Hi 58 °F Lo 51 °F Hi 57 °F Lo 50 °F Hi 54 °F Lo 48 °F Hi 54 °F Lo 44 °F Hi 54 °F

Flood Watch
Wind Advisory
 

This Afternoon
 
 Showers likely. Cloudy, with a high near 58. South wind around 16 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
 
 Showers before 1am, then showers and possibly a thunderstorm between 1am and 4am, then showers after 4am. Low around 51. Breezy, with a south southeast wind 15 to 22 mph, with gusts as high as 49 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
 
 Showers, with thunderstorms also possible after 10am. Some of the storms could be severe. High near 57. Southwest wind 7 to 10 mph becoming southeast in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
 
 Showers and possibly a thunderstorm. Some of the storms could be severe. Low around 50. Breezy, with a south wind 18 to 23 mph, with gusts as high as 44 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Christmas Day
 
 Showers and possibly a thunderstorm before 7am, then showers between 7am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 54. South wind around 18 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
 
 Showers and possibly a thunderstorm. Low around 48. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Friday
 
 Showers, with thunderstorms also possible after 1pm. High near 54. Chance of precipitation is 90%.
Friday Night
 
 Showers likely and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms after 10pm. Mostly cloudy, with a low around 44.
Saturday
 
 A chance of showers, mainly before 10am. Mostly sunny, with a high near 54.
Saturday Night
 
 Mostly clear, with a low around 39.
Sunday
 
 Mostly sunny, with a high near 53.
Sunday Night
 
 Partly cloudy, with a low around 38.
Monday
 
 Sunny, with a high near 54.

 

Forecast from NOAA-NWS for Fairfax CA.