National Weather Service Forecast for: Petaluma CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 12:48 am PST Dec 23, 2025
 
Overnight

Overnight: A 50 percent chance of rain. Areas of fog. Otherwise, cloudy, with a steady temperature around 53. East southeast wind 3 to 5 mph. New precipitation amounts of less than a tenth of an inch possible.
Chance Rain
and Areas Fog

 Tuesday

Tuesday: Rain likely, mainly after 4pm. Patchy fog before 9am. Otherwise, cloudy, with a high near 57. South southeast wind 7 to 16 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Rain Likely
and Patchy
Fog
 Tuesday
Night
Tuesday Night: Rain and possibly a thunderstorm. Low around 50. Breezy, with a southeast wind 15 to 23 mph, with gusts as high as 48 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Rain and
Breezy

 Wednesday

Wednesday: Rain, mainly before 4pm, then showers and possibly a thunderstorm after 4pm. Some of the storms could be severe. Patchy dense fog before 1pm. High near 55. Light south wind becoming southeast 6 to 11 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Severe
T-Storms
and Patchy
Dense Fog
 Wednesday
Night
Wednesday Night: Showers and possibly a thunderstorm before 10pm, then rain between 10pm and 1am, then showers and possibly a thunderstorm after 1am. Some of the storms could be severe. Low around 50. South southeast wind 16 to 18 mph, with gusts as high as 39 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Severe
T-Storms

 Christmas
Day
Christmas Day: Showers and possibly a thunderstorm. High near 52. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Showers

 Thursday
Night
Thursday Night: Showers and possibly a thunderstorm before 4am, then rain and possibly a thunderstorm after 4am. Low around 45. Chance of precipitation is 100%.
Showers

 Friday

Friday: Rain. Cloudy, with a high near 52.
Rain

 Friday
Night
Friday Night: Rain likely, mainly before 10pm. Patchy fog. Otherwise, mostly cloudy, with a low around 42.
Rain Likely
and Patchy
Fog
Lo 53 °F Hi 57 °F Lo 50 °F Hi 55 °F Lo 50 °F Hi 52 °F Lo 45 °F Hi 52 °F Lo 42 °F

Flood Watch
Wind Advisory
 

Overnight
 
 A 50 percent chance of rain. Areas of fog. Otherwise, cloudy, with a steady temperature around 53. East southeast wind 3 to 5 mph. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
 
 Rain likely, mainly after 4pm. Patchy fog before 9am. Otherwise, cloudy, with a high near 57. South southeast wind 7 to 16 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
 
 Rain and possibly a thunderstorm. Low around 50. Breezy, with a southeast wind 15 to 23 mph, with gusts as high as 48 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
 
 Rain, mainly before 4pm, then showers and possibly a thunderstorm after 4pm. Some of the storms could be severe. Patchy dense fog before 1pm. High near 55. Light south wind becoming southeast 6 to 11 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
 
 Showers and possibly a thunderstorm before 10pm, then rain between 10pm and 1am, then showers and possibly a thunderstorm after 1am. Some of the storms could be severe. Low around 50. South southeast wind 16 to 18 mph, with gusts as high as 39 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Christmas Day
 
 Showers and possibly a thunderstorm. High near 52. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
 
 Showers and possibly a thunderstorm before 4am, then rain and possibly a thunderstorm after 4am. Low around 45. Chance of precipitation is 100%.
Friday
 
 Rain. Cloudy, with a high near 52.
Friday Night
 
 Rain likely, mainly before 10pm. Patchy fog. Otherwise, mostly cloudy, with a low around 42.
Saturday
 
 Areas of fog before 11am. Otherwise, mostly sunny, with a high near 54.
Saturday Night
 
 Patchy fog. Otherwise, mostly clear, with a low around 38.
Sunday
 
 Sunny, with a high near 54.
Sunday Night
 
 Patchy fog. Otherwise, mostly clear, with a low around 38.
Monday
 
 Patchy fog. Otherwise, mostly sunny, with a high near 54.

 

Forecast from NOAA-NWS for Petaluma CA.