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

Overnight: Rain likely. Widespread fog, mainly before 3am. Otherwise, cloudy, with a steady temperature around 53. Calm wind becoming southeast around 5 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Rain Likely
and Fog

 Tuesday

Tuesday: Rain likely. Areas of fog before 9am. Otherwise, cloudy, with a high near 56. South southeast wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 34 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Rain Likely
and Areas Fog

 Tuesday
Night
Tuesday Night: Rain before 10pm, then showers and possibly a thunderstorm between 10pm and 4am, then rain likely and possibly a thunderstorm after 4am. Low around 49. Breezy, with a southeast wind 17 to 26 mph, with gusts as high as 55 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Showers and
Breezy

 Wednesday

Wednesday: Rain, mainly before 4pm, then showers and possibly a thunderstorm after 4pm. Some of the storms could be severe. Areas of dense fog before 10am. High near 55. Light southeast wind increasing to 5 to 9 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Rain and
Areas Dense
Fog then
Severe
T-Storms
 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 49. South southeast wind around 14 mph, with gusts as high as 31 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 after 4am. Patchy fog after 1am. Low around 44. Chance of precipitation is 100%.
Showers and
Patchy Fog

 Friday

Friday: Rain before 10am, then showers and possibly a thunderstorm between 10am and 4pm, then rain likely and possibly a thunderstorm after 4pm. Areas of fog before 4pm. Otherwise, cloudy, with a high near 52.
Showers and
Areas Fog

 Friday
Night
Friday Night: Rain likely, mainly before 10pm. Patchy fog after 9pm. Otherwise, mostly cloudy, with a low around 41.
Rain Likely
and Patchy
Fog
Lo 53 °F Hi 56 °F Lo 49 °F Hi 55 °F Lo 49 °F Hi 52 °F Lo 44 °F Hi 52 °F Lo 41 °F

Flood Watch
Wind Advisory
 

Overnight
 
 Rain likely. Widespread fog, mainly before 3am. Otherwise, cloudy, with a steady temperature around 53. Calm wind becoming southeast around 5 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
 
 Rain likely. Areas of fog before 9am. Otherwise, cloudy, with a high near 56. South southeast wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 34 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
 
 Rain before 10pm, then showers and possibly a thunderstorm between 10pm and 4am, then rain likely and possibly a thunderstorm after 4am. Low around 49. Breezy, with a southeast wind 17 to 26 mph, with gusts as high as 55 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. Areas of dense fog before 10am. High near 55. Light southeast wind increasing to 5 to 9 mph in the morning. Winds could gust as high as 18 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 49. South southeast wind around 14 mph, with gusts as high as 31 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 after 4am. Patchy fog after 1am. Low around 44. Chance of precipitation is 100%.
Friday
 
 Rain before 10am, then showers and possibly a thunderstorm between 10am and 4pm, then rain likely and possibly a thunderstorm after 4pm. Areas of fog before 4pm. Otherwise, cloudy, with a high near 52.
Friday Night
 
 Rain likely, mainly before 10pm. Patchy fog after 9pm. Otherwise, mostly cloudy, with a low around 41.
Saturday
 
 Areas of fog before noon. Otherwise, mostly sunny, with a high near 55.
Saturday Night
 
 Patchy fog. Otherwise, mostly clear, with a low around 37.
Sunday
 
 Patchy frost. Otherwise, sunny, with a high near 56.
Sunday Night
 
 Mostly clear, with a low around 38.
Monday
 
 Sunny, with a high near 56.

 

Forecast from NOAA-NWS for Graton CA.