National Weather Service Forecast for: Graton CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 6:21 pm PST Dec 19, 2025
 
Tonight

Tonight: Rain, mainly before 10pm. Patchy fog. Low around 50. Calm wind. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Rain and
Patchy Fog
then Chance
Rain and
Areas Fog
 Saturday

Saturday: Rain, mainly after 10am. Areas of dense fog before 2pm. High near 56. Calm wind. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.
Rain and
Areas Dense
Fog

 Saturday
Night
Saturday Night: Rain. Temperature rising to around 57 by 5am. South southwest wind around 6 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
Rain


 Sunday

Sunday: Rain. High near 57. South southwest wind 8 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
Rain


 Sunday
Night
Sunday Night: Rain. Low around 48. Southwest wind 3 to 8 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Rain


 Monday

Monday: Rain. High near 54. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.
Rain


 Monday
Night
Monday Night: Rain. Low around 47. Chance of precipitation is 90%.
Rain


 Tuesday

Tuesday: Rain. Cloudy, with a high near 54.
Rain


 Tuesday
Night
Tuesday Night: Rain. Cloudy, with a low around 45.
Rain
Lo 50 °F Hi 56 °F Lo 53 °F⇑ Hi 57 °F Lo 48 °F Hi 54 °F Lo 47 °F Hi 54 °F Lo 45 °F

Flood Watch
 

Tonight
 
 Rain, mainly before 10pm. Patchy fog. Low around 50. Calm wind. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
 
 Rain, mainly after 10am. Areas of dense fog before 2pm. High near 56. Calm wind. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.
Saturday Night
 
 Rain. Temperature rising to around 57 by 5am. South southwest wind around 6 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
Sunday
 
 Rain. High near 57. South southwest wind 8 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
Sunday Night
 
 Rain. Low around 48. Southwest wind 3 to 8 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Monday
 
 Rain. High near 54. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.
Monday Night
 
 Rain. Low around 47. Chance of precipitation is 90%.
Tuesday
 
 Rain. Cloudy, with a high near 54.
Tuesday Night
 
 Rain. Cloudy, with a low around 45.
Wednesday
 
 Rain. Cloudy, with a high near 53.
Wednesday Night
 
 Rain. Cloudy, with a low around 46.
Christmas Day
 
 Rain. Cloudy, with a high near 52.
Thursday Night
 
 Rain. Mostly cloudy, with a low around 42.
Friday
 
 Rain likely. Mostly cloudy, with a high near 53.

 

Forecast from NOAA-NWS for Graton CA.