National Weather Service Forecast for: Petaluma CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 1:26 am PDT Jun 22, 2026
 
Overnight

Overnight: Patchy fog. Otherwise, mostly cloudy, with a low around 51. Calm wind.
Patchy Fog
 Monday

Monday: Patchy fog before 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 79. Calm wind becoming west 5 to 9 mph in the afternoon.
Patchy Fog
then Sunny
 Monday
Night
Monday Night: Patchy fog before midnight, then patchy fog after 1am. Otherwise, increasing clouds, with a low around 51. West wind around 6 mph becoming calm in the evening.
Patchy Fog
 Tuesday

Tuesday: Patchy fog before 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 81. Calm wind becoming west 5 to 7 mph in the afternoon.
Patchy Fog
then Sunny
 Tuesday
Night
Tuesday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 52. West wind 5 to 7 mph becoming calm in the evening.
Patchy Fog
 Wednesday

Wednesday: Areas of fog before 8am. Otherwise, mostly sunny, with a high near 81.
Areas Fog
then Sunny
 Wednesday
Night
Wednesday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 52.
Patchy Fog
 Thursday

Thursday: Areas of fog before 8am. Otherwise, sunny, with a high near 80.
Areas Fog
then Sunny
 Thursday
Night
Thursday Night: Partly cloudy, with a low around 53.
Partly Cloudy
Lo 51 °F Hi 79 °F Lo 51 °F Hi 81 °F Lo 52 °F Hi 81 °F Lo 52 °F Hi 80 °F Lo 53 °F

 

Overnight
 
 Patchy fog. Otherwise, mostly cloudy, with a low around 51. Calm wind.
Monday
 
 Patchy fog before 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 79. Calm wind becoming west 5 to 9 mph in the afternoon.
Monday Night
 
 Patchy fog before midnight, then patchy fog after 1am. Otherwise, increasing clouds, with a low around 51. West wind around 6 mph becoming calm in the evening.
Tuesday
 
 Patchy fog before 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 81. Calm wind becoming west 5 to 7 mph in the afternoon.
Tuesday Night
 
 Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 52. West wind 5 to 7 mph becoming calm in the evening.
Wednesday
 
 Areas of fog before 8am. Otherwise, mostly sunny, with a high near 81.
Wednesday Night
 
 Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 52.
Thursday
 
 Areas of fog before 8am. Otherwise, sunny, with a high near 80.
Thursday Night
 
 Partly cloudy, with a low around 53.
Friday
 
 Mostly sunny, with a high near 78.
Friday Night
 
 Partly cloudy, with a low around 54.
Saturday
 
 Sunny, with a high near 78.
Saturday Night
 
 Mostly clear, with a low around 52.
Sunday
 
 Sunny, with a high near 83.

 

Forecast from NOAA-NWS for Petaluma CA.