National Weather Service Forecast for: Monte Rio CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 1:25 am PST Dec 22, 2025
 
Overnight

Overnight: A 50 percent chance of rain. Widespread fog. Otherwise, cloudy, with a steady temperature around 54. Calm wind.
Chance Rain
and Fog
 Monday

Monday: Rain. Widespread fog, mainly after 5pm. High near 56. Light and variable wind. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Rain and Fog

 Monday
Night
Monday Night: Rain. Widespread fog, mainly before 9pm. Low around 50. Calm wind. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Rain and Fog

 Tuesday

Tuesday: Rain. The rain could be heavy at times. Areas of dense fog before 10am. High near 55. Southeast wind 5 to 10 mph increasing to 11 to 16 mph in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
Heavy Rain
and Areas
Dense Fog
 Tuesday
Night
Tuesday Night: Rain, mainly before 4am. The rain could be heavy at times. Patchy fog after 4am. Low around 47. South wind 14 to 21 mph, with gusts as high as 41 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
Heavy Rain
and Patchy
Fog
 Wednesday

Wednesday: Rain likely, mainly after 10am. Patchy dense fog before 1pm. Otherwise, mostly cloudy, with a high near 54. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Rain Likely
and Patchy
Dense Fog
 Wednesday
Night
Wednesday Night: Showers and possibly a thunderstorm. Low around 48. Chance of precipitation is 100%.
Showers

 Christmas
Day
Christmas Day: Showers and possibly a thunderstorm before 10am, then rain after 10am. Cloudy, with a high near 51.
Showers

 Thursday
Night
Thursday Night: Rain. Patchy fog after 1am. Otherwise, cloudy, with a low around 45.
Rain and
Patchy Fog
Lo 54 °F Hi 56 °F Lo 50 °F Hi 55 °F Lo 47 °F Hi 54 °F Lo 48 °F Hi 51 °F Lo 45 °F

Flood Watch
High Wind Watch
 

Overnight
 
 A 50 percent chance of rain. Widespread fog. Otherwise, cloudy, with a steady temperature around 54. Calm wind.
Monday
 
 Rain. Widespread fog, mainly after 5pm. High near 56. Light and variable wind. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
 
 Rain. Widespread fog, mainly before 9pm. Low around 50. Calm wind. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday
 
 Rain. The rain could be heavy at times. Areas of dense fog before 10am. High near 55. Southeast wind 5 to 10 mph increasing to 11 to 16 mph in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
Tuesday Night
 
 Rain, mainly before 4am. The rain could be heavy at times. Patchy fog after 4am. Low around 47. South wind 14 to 21 mph, with gusts as high as 41 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
Wednesday
 
 Rain likely, mainly after 10am. Patchy dense fog before 1pm. Otherwise, mostly cloudy, with a high near 54. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday Night
 
 Showers and possibly a thunderstorm. Low around 48. Chance of precipitation is 100%.
Christmas Day
 
 Showers and possibly a thunderstorm before 10am, then rain after 10am. Cloudy, with a high near 51.
Thursday Night
 
 Rain. Patchy fog after 1am. Otherwise, cloudy, with a low around 45.
Friday
 
 Rain likely, mainly before 4pm. Areas of fog before 2pm. Otherwise, mostly cloudy, with a high near 52.
Friday Night
 
 A chance of rain. Patchy fog. Otherwise, partly cloudy, with a low around 39.
Saturday
 
 A slight chance of rain. Patchy fog. Otherwise, mostly sunny, with a high near 54.
Saturday Night
 
 Patchy fog. Otherwise, mostly cloudy, with a low around 39.
Sunday
 
 Patchy fog. Otherwise, mostly sunny, with a high near 54.

 

Forecast from NOAA-NWS for Monte Rio CA.