National Weather Service Forecast for: 8 Miles SSW Saint Helena CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 1:26 am PDT Aug 20, 2026
 
Overnight

Overnight: Patchy fog. Otherwise, mostly cloudy, with a low around 53. Calm wind.
Patchy Fog

 Thursday

Thursday: Patchy fog before 9am. Otherwise, partly sunny, with a high near 85. Calm wind becoming west southwest around 6 mph in the afternoon.
Patchy Fog
then Partly
Sunny
 Thursday
Night
Thursday Night: Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 53. Light west wind.
Mostly Cloudy
then Patchy
Fog
 Friday

Friday: Patchy fog before 8am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 84. Calm wind becoming west southwest 5 to 7 mph in the afternoon.
Patchy Fog
then Mostly
Sunny
 Friday
Night
Friday Night: Patchy fog after midnight. Otherwise, mostly clear, with a low around 50. West southwest wind 5 to 7 mph becoming calm in the evening.
Mostly Clear
then Patchy
Fog
 Saturday

Saturday: Patchy fog before 8am. Otherwise, sunny, with a high near 86.
Patchy Fog
then Sunny
 Saturday
Night
Saturday Night: Patchy fog after 3am. Otherwise, mostly clear, with a low around 52.
Mostly Clear
then Patchy
Fog
 Sunday

Sunday: Areas of fog before 9am. Otherwise, mostly sunny, with a high near 87.
Areas Fog
then Sunny
 Sunday
Night
Sunday Night: Patchy fog after 3am. Otherwise, partly cloudy, with a low around 52.
Partly Cloudy
then Patchy
Fog
Lo 53 °F Hi 85 °F Lo 53 °F Hi 84 °F Lo 50 °F Hi 86 °F Lo 52 °F Hi 87 °F Lo 52 °F

 

Overnight
 
 Patchy fog. Otherwise, mostly cloudy, with a low around 53. Calm wind.
Thursday
 
 Patchy fog before 9am. Otherwise, partly sunny, with a high near 85. Calm wind becoming west southwest around 6 mph in the afternoon.
Thursday Night
 
 Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 53. Light west wind.
Friday
 
 Patchy fog before 8am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 84. Calm wind becoming west southwest 5 to 7 mph in the afternoon.
Friday Night
 
 Patchy fog after midnight. Otherwise, mostly clear, with a low around 50. West southwest wind 5 to 7 mph becoming calm in the evening.
Saturday
 
 Patchy fog before 8am. Otherwise, sunny, with a high near 86.
Saturday Night
 
 Patchy fog after 3am. Otherwise, mostly clear, with a low around 52.
Sunday
 
 Areas of fog before 9am. Otherwise, mostly sunny, with a high near 87.
Sunday Night
 
 Patchy fog after 3am. Otherwise, partly cloudy, with a low around 52.
Monday
 
 Areas of fog before 9am. Otherwise, mostly sunny, with a high near 83.
Monday Night
 
 Patchy fog. Otherwise, partly cloudy, with a low around 51.
Tuesday
 
 Areas of fog. Otherwise, mostly sunny, with a high near 84.
Tuesday Night
 
 Patchy fog. Otherwise, partly cloudy, with a low around 51.
Wednesday
 
 Areas of fog. Otherwise, mostly sunny, with a high near 86.

 

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