National Weather Service Forecast for: Petrolia CA
Issued by: National Weather Service Eureka, CA
Updated: 2:10 pm PDT Sep 12, 2026
 
Tonight

Tonight: Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 51. Calm wind.
Mostly Cloudy
then Patchy
Fog

 Sunday

Sunday: Isolated showers before 11am. Patchy fog before 11am. Otherwise, mostly sunny, with a high near 72. Light and variable wind becoming north northwest 5 to 10 mph in the afternoon. Chance of precipitation is 20%.
Isolated
Showers and
Patchy Fog
then Mostly
Sunny
 Sunday
Night
Sunday Night: Partly cloudy, with a low around 52. North wind 5 to 10 mph, with gusts as high as 18 mph.
Partly Cloudy


 Monday

Monday: Sunny, with a high near 74. North wind 5 to 9 mph.
Sunny


 Monday
Night
Monday Night: Mostly clear, with a low around 52. North wind 5 to 9 mph becoming light after midnight. Winds could gust as high as 23 mph.
Mostly Clear


 Tuesday

Tuesday: Sunny, with a high near 77. North wind 3 to 8 mph.
Sunny


 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 52.
Mostly Clear


 Wednesday

Wednesday: Sunny, with a high near 77.
Sunny


 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 55.
Mostly Clear
Lo 51 °F Hi 72 °F Lo 52 °F Hi 74 °F Lo 52 °F Hi 77 °F Lo 52 °F Hi 77 °F Lo 55 °F

 

Tonight
 
 Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 51. Calm wind.
Sunday
 
 Isolated showers before 11am. Patchy fog before 11am. Otherwise, mostly sunny, with a high near 72. Light and variable wind becoming north northwest 5 to 10 mph in the afternoon. Chance of precipitation is 20%.
Sunday Night
 
 Partly cloudy, with a low around 52. North wind 5 to 10 mph, with gusts as high as 18 mph.
Monday
 
 Sunny, with a high near 74. North wind 5 to 9 mph.
Monday Night
 
 Mostly clear, with a low around 52. North wind 5 to 9 mph becoming light after midnight. Winds could gust as high as 23 mph.
Tuesday
 
 Sunny, with a high near 77. North wind 3 to 8 mph.
Tuesday Night
 
 Mostly clear, with a low around 52.
Wednesday
 
 Sunny, with a high near 77.
Wednesday Night
 
 Mostly clear, with a low around 55.
Thursday
 
 Sunny, with a high near 77.
Thursday Night
 
 Mostly clear, with a low around 54.
Friday
 
 Mostly sunny, with a high near 74.
Friday Night
 
 Partly cloudy, with a low around 53.
Saturday
 
 Mostly sunny, with a high near 71.

 

Forecast from NOAA-NWS for Petrolia CA.