National Weather Service Forecast for: Fairfax CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 1:26 pm PDT May 26, 2026
 
Tonight

Tonight: Mostly clear, with a low around 48. West northwest wind 13 to 18 mph becoming light  after midnight. Winds could gust as high as 34 mph.
Mostly Clear

Wednesday

Wednesday: Mostly sunny, with a high near 68. Calm wind becoming west southwest 5 to 7 mph in the afternoon.
Mostly Sunny

Wednesday
Night
Wednesday Night: A 20 percent chance of rain after 4am.  Mostly cloudy, with a low around 50. West southwest wind around 5 mph becoming calm  in the evening.  New precipitation amounts of less than a tenth of an inch possible.
Partly Cloudy
then Slight
Chance Rain
Thursday

Thursday: A 30 percent chance of rain before 11am.  Mostly cloudy, then gradually becoming sunny, with a high near 68. Calm wind becoming southwest 5 to 7 mph in the afternoon.  New precipitation amounts of less than a tenth of an inch possible.
Chance Rain
then Mostly
Sunny
Thursday
Night
Thursday Night: Partly cloudy, with a low around 51. West southwest wind 3 to 8 mph.
Partly Cloudy

Friday

Friday: Mostly sunny, with a high near 67.
Mostly Sunny

Friday
Night
Friday Night: Mostly clear, with a low around 50.
Mostly Clear

Saturday

Saturday: Sunny, with a high near 72.
Sunny

Saturday
Night
Saturday Night: Clear, with a low around 48.
Clear

Lo 48 °F Hi 68 °F Lo 50 °F Hi 68 °F Lo 51 °F Hi 67 °F Lo 50 °F Hi 72 °F Lo 48 °F

 

Tonight
 
Mostly clear, with a low around 48. West northwest wind 13 to 18 mph becoming light after midnight. Winds could gust as high as 34 mph.
Wednesday
 
Mostly sunny, with a high near 68. Calm wind becoming west southwest 5 to 7 mph in the afternoon.
Wednesday Night
 
A 20 percent chance of rain after 4am. Mostly cloudy, with a low around 50. West southwest wind around 5 mph becoming calm in the evening. New precipitation amounts of less than a tenth of an inch possible.
Thursday
 
A 30 percent chance of rain before 11am. Mostly cloudy, then gradually becoming sunny, with a high near 68. Calm wind becoming southwest 5 to 7 mph in the afternoon. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
 
Partly cloudy, with a low around 51. West southwest wind 3 to 8 mph.
Friday
 
Mostly sunny, with a high near 67.
Friday Night
 
Mostly clear, with a low around 50.
Saturday
 
Sunny, with a high near 72.
Saturday Night
 
Clear, with a low around 48.
Sunday
 
Sunny, with a high near 78.
Sunday Night
 
Clear, with a low around 50.
Monday
 
Sunny, with a high near 79.
Monday Night
 
Mostly clear, with a low around 51.
Tuesday
 
Sunny, with a high near 78.

 

Forecast from NOAA-NWS for Fairfax CA.