National Weather Service Forecast for: Graton CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 3:06 pm PST Nov 1, 2026
 
Tonight

Tonight: Patchy fog after 10pm. Otherwise, partly cloudy, with a low around 41. Calm wind.
Patchy Fog


 Monday

Monday: Areas of fog before 9am. Otherwise, mostly cloudy, with a high near 66. Calm wind.
Areas Fog
then Mostly
Cloudy

 Monday
Night
Monday Night: A 40 percent chance of showers after 3am. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 44. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Patchy Fog
then Chance
Showers and
Areas Fog
 Tuesday

Tuesday: Showers, mainly before 4pm. High near 62. Light southeast wind. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Showers


 Tuesday
Night
Tuesday Night: A 40 percent chance of showers before 10pm. Patchy fog. Otherwise, mostly cloudy, with a low around 43. Calm wind.
Chance
Showers and
Patchy Fog
then Patchy
Fog
 Wednesday

Wednesday: Patchy fog before 10am. Otherwise, mostly sunny, with a high near 69.
Patchy Fog
then Mostly
Sunny

 Wednesday
Night
Wednesday Night: Patchy fog after 1am. Otherwise, partly cloudy, with a low around 43.
Partly Cloudy
then Patchy
Fog

 Thursday

Thursday: Mostly sunny, with a high near 72.
Mostly Sunny


 Thursday
Night
Thursday Night: Patchy fog before 4am, then patchy fog after 5am. Otherwise, partly cloudy, with a low around 42.
Mostly Clear
then Patchy
Fog
Lo 41 °F Hi 66 °F Lo 44 °F Hi 62 °F Lo 43 °F Hi 69 °F Lo 43 °F Hi 72 °F Lo 42 °F

 

Tonight
 
 Patchy fog after 10pm. Otherwise, partly cloudy, with a low around 41. Calm wind.
Monday
 
 Areas of fog before 9am. Otherwise, mostly cloudy, with a high near 66. Calm wind.
Monday Night
 
 A 40 percent chance of showers after 3am. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 44. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
 
 Showers, mainly before 4pm. High near 62. Light southeast wind. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
 
 A 40 percent chance of showers before 10pm. Patchy fog. Otherwise, mostly cloudy, with a low around 43. Calm wind.
Wednesday
 
 Patchy fog before 10am. Otherwise, mostly sunny, with a high near 69.
Wednesday Night
 
 Patchy fog after 1am. Otherwise, partly cloudy, with a low around 43.
Thursday
 
 Mostly sunny, with a high near 72.
Thursday Night
 
 Patchy fog before 4am, then patchy fog after 5am. Otherwise, partly cloudy, with a low around 42.
Friday
 
 Patchy fog before 7am. Otherwise, mostly sunny, with a high near 75.
Friday Night
 
 Mostly clear, with a low around 44.
Saturday
 
 Sunny, with a high near 76.
Saturday Night
 
 Patchy fog. Otherwise, partly cloudy, with a low around 44.
Sunday
 
 Areas of fog. Otherwise, mostly sunny, with a high near 76.

 

Forecast from NOAA-NWS for Graton CA.