National Weather Service Forecast for: Saint Helena CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 2:02 am PDT Apr 26, 2025
 
Overnight

Overnight: Widespread fog. Otherwise, mostly cloudy, with a low around 43. Calm wind.
Fog

 Saturday

Saturday: A 50 percent chance of showers. Areas of fog before 10am. Otherwise, mostly cloudy, with a high near 61. Light and variable wind. New precipitation amounts of less than a tenth of an inch possible.
Chance
Showers and
Areas Fog
 Saturday
Night
Saturday Night: A 40 percent chance of showers. Widespread fog, mainly after 4am. Otherwise, mostly cloudy, with a low around 45. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Chance
Showers and
Fog
 Sunday

Sunday: Widespread fog, mainly before 8am. Otherwise, partly sunny, with a high near 64. Calm wind.
Fog then
Partly Sunny
 Sunday
Night
Sunday Night: Patchy fog after midnight. Otherwise, partly cloudy, with a low around 45. Calm wind.
Partly Cloudy
then Patchy
Fog
 Monday

Monday: Areas of fog before 9am. Otherwise, sunny, with a high near 76.
Areas Fog
then Sunny
 Monday
Night
Monday Night: Mostly clear, with a low around 49.
Mostly Clear

 Tuesday

Tuesday: Mostly sunny, with a high near 79.
Mostly Sunny

 Tuesday
Night
Tuesday Night: Patchy fog after 3am. Otherwise, partly cloudy, with a low around 52.
Partly Cloudy
then Patchy
Fog
Lo 43 °F Hi 61 °F Lo 45 °F Hi 64 °F Lo 45 °F Hi 76 °F Lo 49 °F Hi 79 °F Lo 52 °F

 

Overnight
 
 Widespread fog. Otherwise, mostly cloudy, with a low around 43. Calm wind.
Saturday
 
 A 50 percent chance of showers. Areas of fog before 10am. Otherwise, mostly cloudy, with a high near 61. Light and variable wind. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
 
 A 40 percent chance of showers. Widespread fog, mainly after 4am. Otherwise, mostly cloudy, with a low around 45. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Sunday
 
 Widespread fog, mainly before 8am. Otherwise, partly sunny, with a high near 64. Calm wind.
Sunday Night
 
 Patchy fog after midnight. Otherwise, partly cloudy, with a low around 45. Calm wind.
Monday
 
 Areas of fog before 9am. Otherwise, sunny, with a high near 76.
Monday Night
 
 Mostly clear, with a low around 49.
Tuesday
 
 Mostly sunny, with a high near 79.
Tuesday Night
 
 Patchy fog after 3am. Otherwise, partly cloudy, with a low around 52.
Wednesday
 
 Patchy fog before 7am. Otherwise, sunny, with a high near 82.
Wednesday Night
 
 Patchy fog. Otherwise, mostly clear, with a low around 51.
Thursday
 
 Areas of fog. Otherwise, sunny, with a high near 79.
Thursday Night
 
 Patchy fog. Otherwise, mostly clear, with a low around 49.
Friday
 
 Areas of fog. Otherwise, mostly sunny, with a high near 74.

 

Forecast from NOAA-NWS for Saint Helena CA.