National Weather Service Forecast for: 8 Miles SSW Saint Helena CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 5:12 am PDT Mar 19, 2026
 
This
Afternoon
This Afternoon: Sunny, with a high near 91. Light west wind.
Sunny
 Tonight

Tonight: Clear, with a low around 60. Calm wind.
Clear
 Friday

Friday: Sunny, with a high near 90. Calm wind becoming west southwest around 5 mph in the afternoon.
Sunny
 Friday
Night
Friday Night: Partly cloudy, with a low around 59. West southwest wind around 5 mph becoming calm in the evening.
Partly Cloudy
 Saturday

Saturday: Mostly sunny, with a high near 84. Calm wind becoming west around 6 mph in the afternoon.
Mostly Sunny
 Saturday
Night
Saturday Night: Mostly clear, with a low around 54.
Mostly Clear
 Sunday

Sunday: Sunny, with a high near 80.
Sunny
 Sunday
Night
Sunday Night: Mostly clear, with a low around 52.
Mostly Clear
 Monday

Monday: Sunny, with a high near 81.
Sunny
Hi 91 °F Lo 60 °F Hi 90 °F Lo 59 °F Hi 84 °F Lo 54 °F Hi 80 °F Lo 52 °F Hi 81 °F

Heat Advisory
 

This Afternoon
 
 Sunny, with a high near 91. Light west wind.
Tonight
 
 Clear, with a low around 60. Calm wind.
Friday
 
 Sunny, with a high near 90. Calm wind becoming west southwest around 5 mph in the afternoon.
Friday Night
 
 Partly cloudy, with a low around 59. West southwest wind around 5 mph becoming calm in the evening.
Saturday
 
 Mostly sunny, with a high near 84. Calm wind becoming west around 6 mph in the afternoon.
Saturday Night
 
 Mostly clear, with a low around 54.
Sunday
 
 Sunny, with a high near 80.
Sunday Night
 
 Mostly clear, with a low around 52.
Monday
 
 Sunny, with a high near 81.
Monday Night
 
 Mostly clear, with a low around 53.
Tuesday
 
 Sunny, with a high near 81.
Tuesday Night
 
 Mostly clear, with a low around 52.
Wednesday
 
 Sunny, with a high near 77.

 

Forecast from NOAA-NWS for 8 Miles SSW Saint Helena CA.