National Weather Service Forecast for: Saint Helena CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 5:12 am PDT Mar 19, 2026
 
Today

Today: Sunny, with a high near 94. Calm wind.
Sunny
 Tonight

Tonight: Clear, with a low around 61. Calm wind.
Clear
 Friday

Friday: Sunny, with a high near 94. Calm wind.
Sunny
 Friday
Night
Friday Night: Increasing clouds, with a low around 59. Calm wind.
Increasing
Clouds
 Saturday

Saturday: Mostly sunny, with a high near 88. Light west wind.
Mostly Sunny
 Saturday
Night
Saturday Night: Mostly clear, with a low around 54.
Mostly Clear
 Sunday

Sunday: Sunny, with a high near 85.
Sunny
 Sunday
Night
Sunday Night: Mostly clear, with a low around 52.
Mostly Clear
 Monday

Monday: Sunny, with a high near 84.
Sunny
Hi 94 °F Lo 61 °F Hi 94 °F Lo 59 °F Hi 88 °F Lo 54 °F Hi 85 °F Lo 52 °F Hi 84 °F

Heat Advisory
 

Today
 
 Sunny, with a high near 94. Calm wind.
Tonight
 
 Clear, with a low around 61. Calm wind.
Friday
 
 Sunny, with a high near 94. Calm wind.
Friday Night
 
 Increasing clouds, with a low around 59. Calm wind.
Saturday
 
 Mostly sunny, with a high near 88. Light west wind.
Saturday Night
 
 Mostly clear, with a low around 54.
Sunday
 
 Sunny, with a high near 85.
Sunday Night
 
 Mostly clear, with a low around 52.
Monday
 
 Sunny, with a high near 84.
Monday Night
 
 Mostly clear, with a low around 54.
Tuesday
 
 Sunny, with a high near 84.
Tuesday Night
 
 Mostly clear, with a low around 52.
Wednesday
 
 Sunny, with a high near 81.

 

Forecast from NOAA-NWS for Saint Helena CA.