National Weather Service Forecast for: 4 Miles SE Saint Helena CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 7:35 pm PST Dec 4, 2025
 
Tonight

Tonight: Mostly clear, with a low around 41. Calm wind.
Mostly Clear

 Friday

Friday: Sunny, with a high near 65. Calm wind becoming southeast around 5 mph.
Sunny

 Friday
Night
Friday Night: Patchy fog after 9pm. Otherwise, mostly clear, with a low around 43. Calm wind.
Patchy Fog

 Saturday

Saturday: Patchy fog before 11am. Otherwise, sunny, with a high near 65. Calm wind.
Patchy Fog
then Sunny
 Saturday
Night
Saturday Night: Patchy fog. Otherwise, partly cloudy, with a low around 43. Calm wind.
Patchy Fog

 Sunday

Sunday: Areas of fog before 10am. Otherwise, partly sunny, with a high near 65.
Areas Fog
then Mostly
Sunny
 Sunday
Night
Sunday Night: Areas of fog. Otherwise, partly cloudy, with a low around 43.
Areas Fog

 Monday

Monday: Areas of fog before 10am. Otherwise, mostly sunny, with a high near 66.
Areas Fog
then Mostly
Sunny
 Monday
Night
Monday Night: Patchy fog after 9pm. Otherwise, partly cloudy, with a low around 44.
Patchy Fog
Lo 41 °F Hi 65 °F Lo 43 °F Hi 65 °F Lo 43 °F Hi 65 °F Lo 43 °F Hi 66 °F Lo 44 °F

Coastal Flood Advisory
 

Tonight
 
 Mostly clear, with a low around 41. Calm wind.
Friday
 
 Sunny, with a high near 65. Calm wind becoming southeast around 5 mph.
Friday Night
 
 Patchy fog after 9pm. Otherwise, mostly clear, with a low around 43. Calm wind.
Saturday
 
 Patchy fog before 11am. Otherwise, sunny, with a high near 65. Calm wind.
Saturday Night
 
 Patchy fog. Otherwise, partly cloudy, with a low around 43. Calm wind.
Sunday
 
 Areas of fog before 10am. Otherwise, partly sunny, with a high near 65.
Sunday Night
 
 Areas of fog. Otherwise, partly cloudy, with a low around 43.
Monday
 
 Areas of fog before 10am. Otherwise, mostly sunny, with a high near 66.
Monday Night
 
 Patchy fog after 9pm. Otherwise, partly cloudy, with a low around 44.
Tuesday
 
 Areas of fog before 9am. Otherwise, mostly sunny, with a high near 67.
Tuesday Night
 
 Patchy fog. Otherwise, mostly cloudy, with a low around 45.
Wednesday
 
 Patchy fog. Otherwise, mostly sunny, with a high near 69.
Wednesday Night
 
 Patchy fog. Otherwise, partly cloudy, with a low around 46.
Thursday
 
 Patchy fog. Otherwise, mostly sunny, with a high near 69.

 

Forecast from NOAA-NWS for 4 Miles SE Saint Helena CA.