National Weather Service Forecast for: Clayton CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 1:40 am PST Dec 5, 2025
 
Overnight

Overnight: Patchy fog after 3am. Patchy frost after 2am. Otherwise, mostly clear, with a low around 36. Calm wind becoming southeast around 5 mph.
Patchy Frost
and Patchy
Fog
 Friday

Friday: Areas of frost before 8am. Otherwise, sunny, with a high near 61. Calm wind becoming north around 6 mph.
Areas Frost
then Sunny
 Friday
Night
Friday Night: Mostly clear, with a low around 39. Calm wind becoming east northeast around 6 mph after midnight.
Mostly Clear

 Saturday

Saturday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 62. Calm wind becoming north northeast around 5 mph.
Patchy Fog
then Sunny
 Saturday
Night
Saturday Night: Mostly clear, with a low around 42. East wind around 7 mph.
Mostly Clear

 Sunday

Sunday: Mostly sunny, with a high near 64.
Mostly Sunny

 Sunday
Night
Sunday Night: Partly cloudy, with a low around 43.
Partly Cloudy

 Monday

Monday: Patchy fog between 7am and 8am. Otherwise, mostly sunny, with a high near 64.
Patchy Fog
then Sunny
 Monday
Night
Monday Night: Partly cloudy, with a low around 43.
Partly Cloudy
Lo 36 °F Hi 61 °F Lo 39 °F Hi 62 °F Lo 42 °F Hi 64 °F Lo 43 °F Hi 64 °F Lo 43 °F

Cold Weather Advisory
 

Overnight
 
 Patchy fog after 3am. Patchy frost after 2am. Otherwise, mostly clear, with a low around 36. Calm wind becoming southeast around 5 mph.
Friday
 
 Areas of frost before 8am. Otherwise, sunny, with a high near 61. Calm wind becoming north around 6 mph.
Friday Night
 
 Mostly clear, with a low around 39. Calm wind becoming east northeast around 6 mph after midnight.
Saturday
 
 Patchy fog before 9am. Otherwise, mostly sunny, with a high near 62. Calm wind becoming north northeast around 5 mph.
Saturday Night
 
 Mostly clear, with a low around 42. East wind around 7 mph.
Sunday
 
 Mostly sunny, with a high near 64.
Sunday Night
 
 Partly cloudy, with a low around 43.
Monday
 
 Patchy fog between 7am and 8am. Otherwise, mostly sunny, with a high near 64.
Monday Night
 
 Partly cloudy, with a low around 43.
Tuesday
 
 Patchy fog before 9am. Otherwise, mostly sunny, with a high near 64.
Tuesday Night
 
 Patchy fog. Otherwise, partly cloudy, with a low around 45.
Wednesday
 
 Patchy fog. Otherwise, mostly sunny, with a high near 66.
Wednesday Night
 
 Patchy fog. Otherwise, mostly clear, with a low around 45.
Thursday
 
 Patchy fog. Otherwise, mostly sunny, with a high near 65.

 

Forecast from NOAA-NWS for Clayton CA.