National Weather Service Forecast for: Graton CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 1:24 pm PST Dec 17, 2025
 
Tonight

Tonight: Widespread dense fog. Otherwise, mostly cloudy, with a low around 45. Calm wind.
Dense Fog

 Thursday

Thursday: A 20 percent chance of rain after 10am. Widespread fog, mainly before noon. Otherwise, cloudy, with a high near 57. Calm wind.
Slight Chance
Rain and Fog

 Thursday
Night
Thursday Night: Rain likely. Widespread fog, mainly between 8pm and 4am. Otherwise, cloudy, with a low around 50. Calm wind. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Rain Likely
and Fog

 Friday

Friday: Rain. Areas of fog before 7am. High near 56. South wind 3 to 8 mph. Winds could gust as high as 18 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Rain and
Areas Fog

 Friday
Night
Friday Night: Rain, mainly before 10pm. Widespread fog, mainly after 4am. Low around 50. Light west wind. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Rain and
Patchy Fog
then Chance
Rain and Fog
 Saturday

Saturday: Rain, mainly after 10am. Widespread fog, mainly before 7am. High near 55. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Rain and Fog

 Saturday
Night
Saturday Night: Rain before 10pm, then showers and possibly a thunderstorm after 10pm. Patchy fog before 10pm, then patchy fog after 1am. Low around 50. Chance of precipitation is 90%.
Showers and
Patchy Fog

 Sunday

Sunday: Showers and possibly a thunderstorm. Cloudy, with a high near 57.
Showers

 Sunday
Night
Sunday Night: Rain. Cloudy, with a low around 48.
Rain
Lo 45 °F Hi 57 °F Lo 50 °F Hi 56 °F Lo 50 °F Hi 55 °F Lo 50 °F Hi 57 °F Lo 48 °F

 

Tonight
 
 Widespread dense fog. Otherwise, mostly cloudy, with a low around 45. Calm wind.
Thursday
 
 A 20 percent chance of rain after 10am. Widespread fog, mainly before noon. Otherwise, cloudy, with a high near 57. Calm wind.
Thursday Night
 
 Rain likely. Widespread fog, mainly between 8pm and 4am. Otherwise, cloudy, with a low around 50. Calm wind. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Friday
 
 Rain. Areas of fog before 7am. High near 56. South wind 3 to 8 mph. Winds could gust as high as 18 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
 
 Rain, mainly before 10pm. Widespread fog, mainly after 4am. Low around 50. Light west wind. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
 
 Rain, mainly after 10am. Widespread fog, mainly before 7am. High near 55. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Saturday Night
 
 Rain before 10pm, then showers and possibly a thunderstorm after 10pm. Patchy fog before 10pm, then patchy fog after 1am. Low around 50. Chance of precipitation is 90%.
Sunday
 
 Showers and possibly a thunderstorm. Cloudy, with a high near 57.
Sunday Night
 
 Rain. Cloudy, with a low around 48.
Monday
 
 Rain likely. Cloudy, with a high near 56.
Monday Night
 
 Rain likely. Patchy fog. Otherwise, cloudy, with a low around 44.
Tuesday
 
 Rain likely. Patchy fog. Otherwise, cloudy, with a high near 52.
Tuesday Night
 
 Rain. Cloudy, with a low around 46.
Wednesday
 
 Rain likely. Cloudy, with a high near 54.

 

Forecast from NOAA-NWS for Graton CA.