National Weather Service Forecast for: Napa CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 2:54 pm PST Dec 22, 2025
 
This
Afternoon
This Afternoon: Rain likely. Patchy fog after 5pm. Otherwise, cloudy, with a high near 56. South wind 3 to 5 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Rain Likely
and Patchy
Fog
 Tonight

Tonight: Rain likely, mainly before 4am. Patchy fog. Otherwise, cloudy, with a low around 53. Calm wind. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Rain Likely
and Patchy
Fog
 Tuesday

Tuesday: Rain likely, mainly after 10am. Cloudy, with a high near 56. South wind 6 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Rain Likely

 Tuesday
Night
Tuesday Night: Rain. Low around 48. Southeast wind 15 to 18 mph, with gusts as high as 37 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Rain

 Wednesday

Wednesday: Rain, mainly before 4pm, then showers and possibly a thunderstorm after 4pm. High near 55. South southeast wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Showers

 Wednesday
Night
Wednesday Night: Showers and possibly a thunderstorm before 7pm, then rain between 7pm and 1am, then showers and possibly a thunderstorm after 1am. Low around 50. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Showers

 Christmas
Day
Christmas Day: Showers and possibly a thunderstorm. High near 52. Chance of precipitation is 100%.
Showers

 Thursday
Night
Thursday Night: Showers and possibly a thunderstorm before 10pm, then rain after 10pm. Cloudy, with a low around 45.
Showers

 Friday

Friday: Rain, mainly before 4pm. Cloudy, with a high near 50.
Rain
Hi 56 °F Lo 53 °F Hi 56 °F Lo 48 °F Hi 55 °F Lo 50 °F Hi 52 °F Lo 45 °F Hi 50 °F

Flood Watch
High Wind Watch
 

This Afternoon
 
 Rain likely. Patchy fog after 5pm. Otherwise, cloudy, with a high near 56. South wind 3 to 5 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
 
 Rain likely, mainly before 4am. Patchy fog. Otherwise, cloudy, with a low around 53. Calm wind. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
 
 Rain likely, mainly after 10am. Cloudy, with a high near 56. South wind 6 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
 
 Rain. Low around 48. Southeast wind 15 to 18 mph, with gusts as high as 37 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Wednesday
 
 Rain, mainly before 4pm, then showers and possibly a thunderstorm after 4pm. High near 55. South southeast wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
 
 Showers and possibly a thunderstorm before 7pm, then rain between 7pm and 1am, then showers and possibly a thunderstorm after 1am. Low around 50. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Christmas Day
 
 Showers and possibly a thunderstorm. High near 52. Chance of precipitation is 100%.
Thursday Night
 
 Showers and possibly a thunderstorm before 10pm, then rain after 10pm. Cloudy, with a low around 45.
Friday
 
 Rain, mainly before 4pm. Cloudy, with a high near 50.
Friday Night
 
 A chance of rain, mainly before 10pm. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 42.
Saturday
 
 Patchy fog. Otherwise, mostly sunny, with a high near 53.
Saturday Night
 
 Patchy frost. Otherwise, mostly clear, with a low around 39.
Sunday
 
 Patchy frost. Otherwise, sunny, with a high near 52.
Sunday Night
 
 Patchy frost. Otherwise, partly cloudy, with a low around 38.
Monday
 
 Patchy fog. Patchy frost. Otherwise, mostly sunny, with a high near 53.

 

Forecast from NOAA-NWS for Napa CA.