NWS Forecast for Napa CA

National Weather Service Forecast for: Napa CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA

Updated: 1:40 am PST Dec 5, 2025

Today Patchy Fog then Sunny	Tonight Patchy Fog	Saturday Patchy Fog then Sunny	Saturday Night Patchy Fog	Sunday Patchy Fog then Mostly Sunny	Sunday Night Areas Fog	Monday Areas Fog then Sunny	Monday Night Patchy Fog	Tuesday Areas Fog then Mostly Sunny
Hi 59 °F	Lo 41 °F	Hi 61 °F	Lo 42 °F	Hi 62 °F	Lo 43 °F	Hi 62 °F	Lo 44 °F	Hi 64 °F

Coastal Flood Advisory
Cold Weather Advisory

Today	Patchy fog before 9am. Otherwise, sunny, with a high near 59. South southwest wind 3 to 7 mph.
Tonight	Patchy fog before 10pm, then patchy fog after 4am. Otherwise, partly cloudy, with a low around 41. Calm wind becoming east around 5 mph after midnight.
Saturday	Patchy fog before 7am. Otherwise, mostly sunny, with a high near 61. South wind around 5 mph.
Saturday Night	Patchy fog. Otherwise, partly cloudy, with a low around 42. Calm wind.
Sunday	Patchy fog before 10am. Otherwise, mostly sunny, with a high near 62. Calm wind becoming south southwest around 5 mph in the afternoon.
Sunday Night	Areas of fog after 10pm. Otherwise, partly cloudy, with a low around 43.
Monday	Areas of fog before noon. Otherwise, mostly sunny, with a high near 62.
Monday Night	Patchy fog. Otherwise, partly cloudy, with a low around 44.
Tuesday	Areas of fog before noon. Otherwise, mostly sunny, with a high near 64.
Tuesday Night	Patchy fog. Otherwise, partly cloudy, with a low around 46.
Wednesday	Patchy fog. Otherwise, mostly sunny, with a high near 66.
Wednesday Night	Patchy fog. Otherwise, mostly clear, with a low around 46.
Thursday	Areas of fog. Otherwise, sunny, with a high near 65.

Forecast from NOAA-NWS for Napa CA.