National Weather Service Forecast for: 3 Miles N Saint Helena CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 7:35 pm PST Dec 4, 2025
 
Overnight

Overnight: Mostly clear, with a low around 42. North wind around 5 mph becoming calm.
Mostly Clear

 Friday

Friday: Sunny, with a high near 63. Light and variable wind.
Sunny

 Friday
Night
Friday Night: Patchy fog before 10pm. Otherwise, mostly clear, with a low around 43. Calm wind.
Patchy Fog
then Mostly
Clear
 Saturday

Saturday: Patchy fog before noon. Otherwise, sunny, with a high near 63. Calm wind.
Patchy Fog
then Sunny
 Saturday
Night
Saturday Night: Partly cloudy, with a low around 44. North wind 3 to 5 mph.
Partly Cloudy

 Sunday

Sunday: Patchy fog between 10am and 11am. Otherwise, mostly sunny, with a high near 63.
Patchy Fog
then Mostly
Sunny
 Sunday
Night
Sunday Night: Patchy fog. Otherwise, partly cloudy, with a low around 43.
Patchy Fog

 Monday

Monday: Areas of fog before 10am. Otherwise, mostly sunny, with a high near 64.
Areas Fog
then Mostly
Sunny
 Monday
Night
Monday Night: Patchy fog after 5am. Otherwise, partly cloudy, with a low around 45.
Partly Cloudy
then Patchy
Fog
Lo 42 °F Hi 63 °F Lo 43 °F Hi 63 °F Lo 44 °F Hi 63 °F Lo 43 °F Hi 64 °F Lo 45 °F

Coastal Flood Advisory
 

Overnight
 
 Mostly clear, with a low around 42. North wind around 5 mph becoming calm.
Friday
 
 Sunny, with a high near 63. Light and variable wind.
Friday Night
 
 Patchy fog before 10pm. Otherwise, mostly clear, with a low around 43. Calm wind.
Saturday
 
 Patchy fog before noon. Otherwise, sunny, with a high near 63. Calm wind.
Saturday Night
 
 Partly cloudy, with a low around 44. North wind 3 to 5 mph.
Sunday
 
 Patchy fog between 10am and 11am. Otherwise, mostly sunny, with a high near 63.
Sunday Night
 
 Patchy fog. Otherwise, partly cloudy, with a low around 43.
Monday
 
 Areas of fog before 10am. Otherwise, mostly sunny, with a high near 64.
Monday Night
 
 Patchy fog after 5am. Otherwise, partly cloudy, with a low around 45.
Tuesday
 
 Patchy fog before 8am. Otherwise, mostly sunny, with a high near 65.
Tuesday Night
 
 Patchy fog. Otherwise, mostly cloudy, with a low around 46.
Wednesday
 
 Areas of fog. Otherwise, mostly sunny, with a high near 67.
Wednesday Night
 
 Patchy fog. Otherwise, partly cloudy, with a low around 46.
Thursday
 
 Patchy fog. Otherwise, sunny, with a high near 66.

 

Forecast from NOAA-NWS for 3 Miles N Saint Helena CA.