National Weather Service Forecast for: 3 Miles N Saint Helena CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 2:37 pm PDT Mar 19, 2026
 
Tonight

Tonight: Clear, with a low around 53. Calm wind.
Clear
 Friday

Friday: Sunny, with a high near 93. Calm wind.
Sunny
 Friday
Night
Friday Night: Increasing clouds, with a low around 57. Calm wind.
Increasing
Clouds
 Saturday

Saturday: Mostly sunny, with a high near 86. Calm wind becoming west around 5 mph in the afternoon.
Mostly Sunny
 Saturday
Night
Saturday Night: Mostly clear, with a low around 53. West wind around 6 mph becoming calm in the evening.
Mostly Clear
 Sunday

Sunday: Sunny, with a high near 84.
Sunny
 Sunday
Night
Sunday Night: Mostly clear, with a low around 51.
Mostly Clear
 Monday

Monday: Sunny, with a high near 80.
Sunny
 Monday
Night
Monday Night: Partly cloudy, with a low around 53.
Partly Cloudy
Lo 53 °F Hi 93 °F Lo 57 °F Hi 86 °F Lo 53 °F Hi 84 °F Lo 51 °F Hi 80 °F Lo 53 °F

Heat Advisory
 

Tonight
 
 Clear, with a low around 53. Calm wind.
Friday
 
 Sunny, with a high near 93. Calm wind.
Friday Night
 
 Increasing clouds, with a low around 57. Calm wind.
Saturday
 
 Mostly sunny, with a high near 86. Calm wind becoming west around 5 mph in the afternoon.
Saturday Night
 
 Mostly clear, with a low around 53. West wind around 6 mph becoming calm in the evening.
Sunday
 
 Sunny, with a high near 84.
Sunday Night
 
 Mostly clear, with a low around 51.
Monday
 
 Sunny, with a high near 80.
Monday Night
 
 Partly cloudy, with a low around 53.
Tuesday
 
 Sunny, with a high near 79.
Tuesday Night
 
 Mostly clear, with a low around 51.
Wednesday
 
 Sunny, with a high near 78.
Wednesday Night
 
 Mostly clear, with a low around 52.
Thursday
 
 Sunny, with a high near 80.

 

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