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

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

Thursday: A 30 percent chance of rain after 10am. Widespread dense fog before 1pm, then patchy dense fog after 4pm. Otherwise, mostly cloudy, with a high near 54. Light and variable wind.
Chance Rain
and Dense Fog
 Thursday
Night
Thursday Night: Rain. Patchy fog before 10pm. Low around 51. Light south southwest wind. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Rain and
Patchy Fog
 Friday

Friday: Rain. High near 55. South wind 7 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Rain
 Friday
Night
Friday Night: Rain, mainly before 10pm. Low around 50. West wind 3 to 6 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Rain then
Chance Rain
 Saturday

Saturday: Rain likely, then showers and possibly a thunderstorm after 4pm. High near 53. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Showers
 Saturday
Night
Saturday Night: Showers and possibly a thunderstorm before 7pm, then rain between 7pm and 10pm, then showers and possibly a thunderstorm after 10pm. Low around 51. Chance of precipitation is 90%.
Showers
 Sunday

Sunday: Showers and possibly a thunderstorm. Cloudy, with a high near 55.
Showers
 Sunday
Night
Sunday Night: Rain. Cloudy, with a low around 49.
Rain
Lo 45 °F Hi 54 °F Lo 51 °F Hi 55 °F Lo 50 °F Hi 53 °F Lo 51 °F Hi 55 °F Lo 49 °F

 

Tonight
 
 Patchy dense fog. Otherwise, mostly cloudy, with a low around 45. Calm wind.
Thursday
 
 A 30 percent chance of rain after 10am. Widespread dense fog before 1pm, then patchy dense fog after 4pm. Otherwise, mostly cloudy, with a high near 54. Light and variable wind.
Thursday Night
 
 Rain. Patchy fog before 10pm. Low around 51. Light south southwest wind. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Friday
 
 Rain. High near 55. South wind 7 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Friday Night
 
 Rain, mainly before 10pm. Low around 50. West wind 3 to 6 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Saturday
 
 Rain likely, then showers and possibly a thunderstorm after 4pm. High near 53. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday Night
 
 Showers and possibly a thunderstorm before 7pm, then rain between 7pm and 10pm, then showers and possibly a thunderstorm after 10pm. Low around 51. Chance of precipitation is 90%.
Sunday
 
 Showers and possibly a thunderstorm. Cloudy, with a high near 55.
Sunday Night
 
 Rain. Cloudy, with a low around 49.
Monday
 
 Rain likely. Mostly cloudy, with a high near 53.
Monday Night
 
 Rain likely. Mostly cloudy, with a low around 45.
Tuesday
 
 Rain likely. Mostly cloudy, with a high near 50.
Tuesday Night
 
 Rain. Cloudy, with a low around 46.
Wednesday
 
 Rain likely. Mostly cloudy, with a high near 52.

 

Forecast from NOAA-NWS for Monte Rio CA.