National Weather Service Forecast for: Saint Helena CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 1:26 pm PDT Jul 4, 2025
 
Tonight

Tonight: Patchy fog after 5am. Otherwise, partly cloudy, with a low around 48. West wind 3 to 8 mph.
Patchy Fog

 Saturday

Saturday: Patchy fog before 7am. Otherwise, sunny, with a high near 84. Southeast wind 5 to 8 mph becoming west southwest in the afternoon.
Patchy Fog
then Sunny
 Saturday
Night
Saturday Night: Mostly clear, with a low around 49. West southwest wind 5 to 8 mph becoming calm.
Mostly Clear

 Sunday

Sunday: Sunny, with a high near 87. East southeast wind around 6 mph becoming south in the afternoon.
Sunny

 Sunday
Night
Sunday Night: Mostly clear, with a low around 50. West southwest wind 5 to 8 mph becoming calm in the evening.
Mostly Clear

 Monday

Monday: Sunny, with a high near 85.
Sunny

 Monday
Night
Monday Night: Patchy fog after midnight. Otherwise, partly cloudy, with a low around 51.
Mostly Clear
then Patchy
Fog
 Tuesday

Tuesday: Areas of fog before 9am. Otherwise, mostly sunny, with a high near 82.
Areas Fog
then Sunny
 Tuesday
Night
Tuesday Night: Patchy fog after midnight. Otherwise, mostly clear, with a low around 51.
Clear then
Patchy Fog
Lo 48 °F Hi 84 °F Lo 49 °F Hi 87 °F Lo 50 °F Hi 85 °F Lo 51 °F Hi 82 °F Lo 51 °F

 

Tonight
 
 Patchy fog after 5am. Otherwise, partly cloudy, with a low around 48. West wind 3 to 8 mph.
Saturday
 
 Patchy fog before 7am. Otherwise, sunny, with a high near 84. Southeast wind 5 to 8 mph becoming west southwest in the afternoon.
Saturday Night
 
 Mostly clear, with a low around 49. West southwest wind 5 to 8 mph becoming calm.
Sunday
 
 Sunny, with a high near 87. East southeast wind around 6 mph becoming south in the afternoon.
Sunday Night
 
 Mostly clear, with a low around 50. West southwest wind 5 to 8 mph becoming calm in the evening.
Monday
 
 Sunny, with a high near 85.
Monday Night
 
 Patchy fog after midnight. Otherwise, partly cloudy, with a low around 51.
Tuesday
 
 Areas of fog before 9am. Otherwise, mostly sunny, with a high near 82.
Tuesday Night
 
 Patchy fog after midnight. Otherwise, mostly clear, with a low around 51.
Wednesday
 
 Areas of fog before 8am. Otherwise, sunny, with a high near 90.
Wednesday Night
 
 Mostly clear, with a low around 57.
Thursday
 
 Sunny and hot, with a high near 97.
Thursday Night
 
 Mostly clear, with a low around 57.
Friday
 
 Sunny, with a high near 95.

 

Forecast from NOAA-NWS for Saint Helena CA.