National Weather Service Forecast for: Napa CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 1:26 am PDT Jun 22, 2026
 
Overnight

Overnight: Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 52. Calm wind.
Patchy Fog
 Monday

Monday: Patchy fog before 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 80. Calm wind becoming south southwest 5 to 9 mph in the afternoon.
Patchy Fog
then Sunny
 Monday
Night
Monday Night: Patchy fog after 2am. Otherwise, increasing clouds, with a low around 52. Southwest wind 5 to 8 mph becoming calm after midnight.
Clear then
Patchy Fog
 Tuesday

Tuesday: Patchy fog before 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 82. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Patchy Fog
then Sunny
 Tuesday
Night
Tuesday Night: Patchy fog after 3am. Otherwise, mostly clear, with a low around 53. Southwest wind 5 to 7 mph becoming calm after midnight.
Clear then
Patchy Fog
 Wednesday

Wednesday: Patchy fog before 8am. Otherwise, sunny, with a high near 82.
Patchy Fog
then Sunny
 Wednesday
Night
Wednesday Night: Patchy fog after 1am. Otherwise, mostly clear, with a low around 53.
Clear then
Patchy Fog
 Thursday

Thursday: Areas of fog before 8am. Otherwise, sunny, with a high near 81.
Areas Fog
then Sunny
 Thursday
Night
Thursday Night: Mostly clear, with a low around 53.
Mostly Clear
Lo 52 °F Hi 80 °F Lo 52 °F Hi 82 °F Lo 53 °F Hi 82 °F Lo 53 °F Hi 81 °F Lo 53 °F

 

Overnight
 
 Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 52. Calm wind.
Monday
 
 Patchy fog before 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 80. Calm wind becoming south southwest 5 to 9 mph in the afternoon.
Monday Night
 
 Patchy fog after 2am. Otherwise, increasing clouds, with a low around 52. Southwest wind 5 to 8 mph becoming calm after midnight.
Tuesday
 
 Patchy fog before 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 82. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Tuesday Night
 
 Patchy fog after 3am. Otherwise, mostly clear, with a low around 53. Southwest wind 5 to 7 mph becoming calm after midnight.
Wednesday
 
 Patchy fog before 8am. Otherwise, sunny, with a high near 82.
Wednesday Night
 
 Patchy fog after 1am. Otherwise, mostly clear, with a low around 53.
Thursday
 
 Areas of fog before 8am. Otherwise, sunny, with a high near 81.
Thursday Night
 
 Mostly clear, with a low around 53.
Friday
 
 Mostly sunny, with a high near 80.
Friday Night
 
 Patchy fog. Otherwise, mostly clear, with a low around 55.
Saturday
 
 Sunny, with a high near 79.
Saturday Night
 
 Clear, with a low around 53.
Sunday
 
 Sunny, with a high near 84.

 

Forecast from NOAA-NWS for Napa CA.