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

Overnight: Areas of fog after 3am. Patchy frost between 4am and 5am. Otherwise, partly cloudy, with a low around 37. East wind around 5 mph.
Patchy Frost
and Areas Fog
 Friday

Friday: Patchy frost before 8am. Otherwise, mostly sunny, with a high near 56. East wind around 5 mph becoming calm in the afternoon.
Patchy Frost
then Sunny
 Friday
Night
Friday Night: Partly cloudy, with a low around 42. South southwest wind around 5 mph becoming calm.
Partly Cloudy
 Saturday

Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 58. Calm wind.
Decreasing
Clouds
 Saturday
Night
Saturday Night: Partly cloudy, with a low around 45. Calm wind becoming south around 5 mph after midnight.
Partly Cloudy
 Sunday

Sunday: Partly sunny, with a high near 61.
Partly Sunny
 Sunday
Night
Sunday Night: Partly cloudy, with a low around 46.
Partly Cloudy
 Monday

Monday: Mostly sunny, with a high near 62.
Mostly Sunny
 Monday
Night
Monday Night: Partly cloudy, with a low around 46.
Partly Cloudy
Lo 37 °F Hi 56 °F Lo 42 °F Hi 58 °F Lo 45 °F Hi 61 °F Lo 46 °F Hi 62 °F Lo 46 °F

Cold Weather Advisory
 

Overnight
 
 Areas of fog after 3am. Patchy frost between 4am and 5am. Otherwise, partly cloudy, with a low around 37. East wind around 5 mph.
Friday
 
 Patchy frost before 8am. Otherwise, mostly sunny, with a high near 56. East wind around 5 mph becoming calm in the afternoon.
Friday Night
 
 Partly cloudy, with a low around 42. South southwest wind around 5 mph becoming calm.
Saturday
 
 Mostly cloudy, then gradually becoming sunny, with a high near 58. Calm wind.
Saturday Night
 
 Partly cloudy, with a low around 45. Calm wind becoming south around 5 mph after midnight.
Sunday
 
 Partly sunny, with a high near 61.
Sunday Night
 
 Partly cloudy, with a low around 46.
Monday
 
 Mostly sunny, with a high near 62.
Monday Night
 
 Partly cloudy, with a low around 46.
Tuesday
 
 Partly sunny, with a high near 61.
Tuesday Night
 
 Partly cloudy, with a low around 47.
Wednesday
 
 Mostly sunny, with a high near 63.
Wednesday Night
 
 Mostly clear, with a low around 48.
Thursday
 
 Mostly sunny, with a high near 62.

 

Forecast from NOAA-NWS for Pittsburg CA.