National Weather Service Forecast for: Clearlake CA
Issued by: National Weather Service Eureka, CA
Updated: 4:14 pm PST Dec 17, 2025
 
Tonight

Tonight: Patchy fog after 7pm. Otherwise, mostly cloudy, with a low around 40. Calm wind.
Patchy Fog

 Thursday

Thursday: A 30 percent chance of rain, mainly after 4pm. Areas of fog before 10am. Otherwise, mostly cloudy, with a high near 61. Calm wind becoming west 5 to 7 mph in the morning.
Chance Rain
and Areas Fog

 Thursday
Night
Thursday Night: Rain, mainly after 10pm. Low around 44. Southwest wind around 6 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Rain

 Friday

Friday: Rain. High near 57. South southwest wind around 10 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Rain

 Friday
Night
Friday Night: Rain, mainly before 10pm. Patchy fog after 4am. Low around 43. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Rain then
Chance Rain
and Patchy
Fog
 Saturday

Saturday: Rain likely, mainly after 10am. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 57. Light and variable wind. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Rain Likely
and Patchy
Fog
 Saturday
Night
Saturday Night: Rain. Low around 46. Chance of precipitation is 90%. New precipitation amounts between three quarters and one inch possible.
Rain

 Sunday

Sunday: Rain. Cloudy, with a high near 57.
Rain

 Sunday
Night
Sunday Night: Rain. Cloudy, with a low around 42.
Rain
Lo 40 °F Hi 61 °F Lo 44 °F Hi 57 °F Lo 43 °F Hi 57 °F Lo 46 °F Hi 57 °F Lo 42 °F

 

Tonight
 
 Patchy fog after 7pm. Otherwise, mostly cloudy, with a low around 40. Calm wind.
Thursday
 
 A 30 percent chance of rain, mainly after 4pm. Areas of fog before 10am. Otherwise, mostly cloudy, with a high near 61. Calm wind becoming west 5 to 7 mph in the morning.
Thursday Night
 
 Rain, mainly after 10pm. Low around 44. Southwest wind around 6 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Friday
 
 Rain. High near 57. South southwest wind around 10 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
 
 Rain, mainly before 10pm. Patchy fog after 4am. Low around 43. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
 
 Rain likely, mainly after 10am. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 57. Light and variable wind. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Saturday Night
 
 Rain. Low around 46. Chance of precipitation is 90%. New precipitation amounts between three quarters and one inch possible.
Sunday
 
 Rain. Cloudy, with a high near 57.
Sunday Night
 
 Rain. Cloudy, with a low around 42.
Monday
 
 Rain likely. Mostly cloudy, with a high near 56.
Monday Night
 
 Rain likely. Areas of fog. Otherwise, mostly cloudy, with a low around 38.
Tuesday
 
 Rain likely. Areas of fog. Otherwise, mostly cloudy, with a high near 53.
Tuesday Night
 
 Rain. Mostly cloudy, with a low around 38.
Wednesday
 
 Rain likely. Mostly cloudy, with a high near 54.

 

Forecast from NOAA-NWS for Clearlake CA.