National Weather Service Forecast for: Saint Helena CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 1:26 am PDT Jul 6, 2025
 
Today

Today: Sunny, with a high near 88. Light and variable wind becoming southwest 5 to 7 mph in the afternoon.
Sunny

 Tonight

Tonight: Patchy fog after 1am. Otherwise, increasing clouds, with a low around 50. West southwest wind 5 to 7 mph becoming calm in the evening.
Mostly Clear
then Patchy
Fog
 Monday

Monday: Patchy fog before 8am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 84. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Patchy Fog
then Sunny
 Monday
Night
Monday Night: Increasing clouds, with a low around 50. West southwest wind 5 to 9 mph becoming light after midnight.
Increasing
Clouds
 Tuesday

Tuesday: Patchy fog between 8am and 9am. Otherwise, mostly sunny, with a high near 82. Calm wind becoming southwest around 6 mph in the afternoon.
Patchy Fog
then Sunny
 Tuesday
Night
Tuesday Night: Patchy fog after midnight. Otherwise, partly cloudy, with a low around 51.
Clear then
Patchy Fog
 Wednesday

Wednesday: Areas of fog before 9am. Otherwise, sunny, with a high near 89.
Areas Fog
then Sunny
 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 57.
Mostly Clear

 Thursday

Thursday: Sunny and hot, with a high near 97.
Hot
Hi 88 °F Lo 50 °F Hi 84 °F Lo 50 °F Hi 82 °F Lo 51 °F Hi 89 °F Lo 57 °F Hi 97 °F

 

Today
 
 Sunny, with a high near 88. Light and variable wind becoming southwest 5 to 7 mph in the afternoon.
Tonight
 
 Patchy fog after 1am. Otherwise, increasing clouds, with a low around 50. West southwest wind 5 to 7 mph becoming calm in the evening.
Monday
 
 Patchy fog before 8am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 84. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Monday Night
 
 Increasing clouds, with a low around 50. West southwest wind 5 to 9 mph becoming light after midnight.
Tuesday
 
 Patchy fog between 8am and 9am. Otherwise, mostly sunny, with a high near 82. Calm wind becoming southwest around 6 mph in the afternoon.
Tuesday Night
 
 Patchy fog after midnight. Otherwise, partly cloudy, with a low around 51.
Wednesday
 
 Areas of fog before 9am. Otherwise, sunny, with a high near 89.
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 58.
Friday
 
 Sunny, with a high near 95.
Friday Night
 
 Patchy fog. Otherwise, mostly clear, with a low around 54.
Saturday
 
 Areas of fog. Otherwise, sunny, with a high near 90.

 

Forecast from NOAA-NWS for Saint Helena CA.