National Weather Service Forecast for: Petaluma CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 1:26 pm PDT Jun 19, 2026
 
Tonight

Tonight: Patchy fog after 2am. Otherwise, increasing clouds, with a low around 53. West southwest wind 5 to 7 mph becoming calm in the evening.
Mostly Cloudy
then Patchy
Fog
 Saturday

Saturday: Patchy fog before 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 73. Light west northwest wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Patchy Fog
then Sunny
 Saturday
Night
Saturday Night: Patchy fog after 2am. Otherwise, increasing clouds, with a low around 51. West wind 5 to 9 mph becoming calm in the evening. Winds could gust as high as 18 mph.
Partly Cloudy
then Patchy
Fog
 Sunday

Sunday: Patchy fog before 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 79. Calm wind becoming west southwest 5 to 8 mph in the afternoon.
Patchy Fog
then Sunny
 Sunday
Night
Sunday Night: Patchy fog after 2am. Otherwise, partly cloudy, with a low around 51. West southwest wind 5 to 9 mph becoming calm in the evening.
Mostly Clear
then Patchy
Fog
 Monday

Monday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 79.
Patchy Fog
then Sunny
 Monday
Night
Monday Night: Patchy fog after 2am. Otherwise, partly cloudy, with a low around 52.
Mostly Clear
then Patchy
Fog
 Tuesday

Tuesday: Areas of fog before 8am. Otherwise, mostly sunny, with a high near 80.
Areas Fog
then Sunny
 Tuesday
Night
Tuesday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 52.
Patchy Fog
Lo 53 °F Hi 73 °F Lo 51 °F Hi 79 °F Lo 51 °F Hi 79 °F Lo 52 °F Hi 80 °F Lo 52 °F

 

Tonight
 
 Patchy fog after 2am. Otherwise, increasing clouds, with a low around 53. West southwest wind 5 to 7 mph becoming calm in the evening.
Saturday
 
 Patchy fog before 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 73. Light west northwest wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
 
 Patchy fog after 2am. Otherwise, increasing clouds, with a low around 51. West wind 5 to 9 mph becoming calm in the evening. Winds could gust as high as 18 mph.
Sunday
 
 Patchy fog before 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 79. Calm wind becoming west southwest 5 to 8 mph in the afternoon.
Sunday Night
 
 Patchy fog after 2am. Otherwise, partly cloudy, with a low around 51. West southwest wind 5 to 9 mph becoming calm in the evening.
Monday
 
 Patchy fog before 8am. Otherwise, mostly sunny, with a high near 79.
Monday Night
 
 Patchy fog after 2am. Otherwise, partly cloudy, with a low around 52.
Tuesday
 
 Areas of fog before 8am. Otherwise, mostly sunny, with a high near 80.
Tuesday Night
 
 Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 52.
Wednesday
 
 Areas of fog before 8am. Otherwise, mostly sunny, with a high near 82.
Wednesday Night
 
 Patchy fog. Otherwise, partly cloudy, with a low around 53.
Thursday
 
 Patchy fog. Otherwise, mostly sunny, with a high near 81.
Thursday Night
 
 Patchy fog. Otherwise, partly cloudy, with a low around 53.
Friday
 
 Mostly sunny, with a high near 81.

 

Forecast from NOAA-NWS for Petaluma CA.