National Weather Service Forecast for: Fairfield CA
Issued by: National Weather Service Sacramento, CA
Updated: 1:21 am PST Feb 2, 2026
 
Overnight

Overnight: Mostly clear, with a low around 43. Light west southwest wind.
Mostly Clear
 Monday

Monday: Sunny, with a high near 69. Calm wind becoming north northeast around 6 mph in the afternoon.
Sunny
 Monday
Night
Monday Night: Partly cloudy, with a low around 41. Calm wind.
Partly Cloudy
 Tuesday

Tuesday: Patchy fog before 9am. Otherwise, sunny, with a high near 68. Northeast wind 3 to 7 mph.
Patchy Fog
then Sunny
 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 41. Calm wind.
Mostly Clear
 Wednesday

Wednesday: Sunny, with a high near 65.
Sunny
 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 42.
Mostly Clear
 Thursday

Thursday: Mostly sunny, with a high near 64.
Mostly Sunny
 Thursday
Night
Thursday Night: Mostly cloudy, with a low around 45.
Mostly Cloudy
Lo 43 °F Hi 69 °F Lo 41 °F Hi 68 °F Lo 41 °F Hi 65 °F Lo 42 °F Hi 64 °F Lo 45 °F

 

Overnight
 
 Mostly clear, with a low around 43. Light west southwest wind.
Monday
 
 Sunny, with a high near 69. Calm wind becoming north northeast around 6 mph in the afternoon.
Monday Night
 
 Partly cloudy, with a low around 41. Calm wind.
Tuesday
 
 Patchy fog before 9am. Otherwise, sunny, with a high near 68. Northeast wind 3 to 7 mph.
Tuesday Night
 
 Mostly clear, with a low around 41. Calm wind.
Wednesday
 
 Sunny, with a high near 65.
Wednesday Night
 
 Mostly clear, with a low around 42.
Thursday
 
 Mostly sunny, with a high near 64.
Thursday Night
 
 Mostly cloudy, with a low around 45.
Friday
 
 Mostly sunny, with a high near 64.
Friday Night
 
 Partly cloudy, with a low around 45.
Saturday
 
 Mostly sunny, with a high near 64.
Saturday Night
 
 Partly cloudy, with a low around 46.
Sunday
 
 A chance of rain. Partly sunny, with a high near 64.

 

Forecast from NOAA-NWS for Fairfield CA.