National Weather Service Forecast for: Napa CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 12:28 pm PST Dec 16, 2025
 
This
Afternoon
This Afternoon: A 30 percent chance of rain, mainly after 4pm. Patchy fog. Otherwise, mostly cloudy, with a high near 57. Calm wind.
Chance Rain
and Patchy
Fog

 Tonight

Tonight: Rain likely, mainly after 10pm. Patchy fog. Otherwise, cloudy, with a low around 51. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Rain Likely
and Patchy
Fog

 Wednesday

Wednesday: Rain likely, mainly before 10am. Patchy fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 60. Calm wind becoming south southwest around 6 mph in the morning. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Rain Likely
and Patchy
Fog then
Slight Chance
Rain
 Wednesday
Night
Wednesday Night: Widespread fog, mainly after 1am. Otherwise, mostly cloudy, with a low around 45. Calm wind.
Fog


 Thursday

Thursday: Widespread fog, mainly before 10am. Otherwise, mostly cloudy, with a high near 58. Calm wind.
Fog


 Thursday
Night
Thursday Night: A 40 percent chance of rain. Patchy fog. Otherwise, cloudy, with a low around 49. New precipitation amounts of less than a tenth of an inch possible.
Chance Rain
and Patchy
Fog

 Friday

Friday: Rain likely, mainly after 10am. Areas of fog before 10am. Otherwise, cloudy, with a high near 57. Chance of precipitation is 60%.
Rain Likely
and Areas Fog

 Friday
Night
Friday Night: Rain. Patchy fog after 1am. Otherwise, cloudy, with a low around 53.
Rain and
Patchy Fog

 Saturday

Saturday: Rain likely. Patchy fog before 10am. Otherwise, cloudy, with a high near 57.
Rain Likely
and Patchy
Fog
Hi 57 °F Lo 51 °F Hi 60 °F Lo 45 °F Hi 58 °F Lo 49 °F Hi 57 °F Lo 53 °F Hi 57 °F

 

This Afternoon
 
 A 30 percent chance of rain, mainly after 4pm. Patchy fog. Otherwise, mostly cloudy, with a high near 57. Calm wind.
Tonight
 
 Rain likely, mainly after 10pm. Patchy fog. Otherwise, cloudy, with a low around 51. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
 
 Rain likely, mainly before 10am. Patchy fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 60. Calm wind becoming south southwest around 6 mph in the morning. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
 
 Widespread fog, mainly after 1am. Otherwise, mostly cloudy, with a low around 45. Calm wind.
Thursday
 
 Widespread fog, mainly before 10am. Otherwise, mostly cloudy, with a high near 58. Calm wind.
Thursday Night
 
 A 40 percent chance of rain. Patchy fog. Otherwise, cloudy, with a low around 49. New precipitation amounts of less than a tenth of an inch possible.
Friday
 
 Rain likely, mainly after 10am. Areas of fog before 10am. Otherwise, cloudy, with a high near 57. Chance of precipitation is 60%.
Friday Night
 
 Rain. Patchy fog after 1am. Otherwise, cloudy, with a low around 53.
Saturday
 
 Rain likely. Patchy fog before 10am. Otherwise, cloudy, with a high near 57.
Saturday Night
 
 Rain. Patchy fog after 4am. Otherwise, cloudy, with a low around 52.
Sunday
 
 Rain. Patchy fog. Otherwise, cloudy, with a high near 56.
Sunday Night
 
 Rain likely. Patchy fog. Otherwise, cloudy, with a low around 52.
Monday
 
 Rain likely. Patchy fog. Otherwise, cloudy, with a high near 56.
Monday Night
 
 Rain likely. Patchy fog. Otherwise, cloudy, with a low around 48.
Tuesday
 
 Rain likely. Patchy fog. Otherwise, cloudy, with a high near 54.

 

Forecast from NOAA-NWS for Napa CA.