Tracking Atmospheric River in the Northwest U.S. and Clipper with Winter Weather in the Northeast U.S.

A prolonged atmospheric river will continue to bring gusty winds, heavy rainfall which may lead to urban and river flooding with possible landslides, and heavy inter-mountain snow over the Pacific Northwest into the northern Rockies through Thursday. A clipper will cross the Great Lakes and Northeast U.S. into Thursday with areas of moderate to heavy snow and mixed wintry precipitation. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

Lat: 38.2075°NLon: 122.27944°WElev: 33.0ft.

Mist

43°F

6°C

Humidity 100%
Wind Speed E 12 MPH
Barometer 30.18 in (1022.01 mb)
Dewpoint 43°F (6°C)
Visibility 3.00 mi
Wind Chill37°F (3°C)
Last update 10 Dec 09:30 PM PST
Extended Forecast for

3 Miles S Napa CA

  • Tonight

    Tonight: Widespread dense fog, mainly after 2am.  Otherwise, partly cloudy, with a low around 40. Light and variable wind.

    Low: 40 °F

    Mostly Clear
    then Dense
    Fog

  • Thursday

    Thursday: Widespread dense fog, mainly before 9am.  Otherwise, sunny, with a high near 57. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 57 °F

    Dense Fog
    then Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 10pm.  Otherwise, mostly clear, with a low around 40. Light and variable wind.

    Low: 40 °F

    Patchy Fog

  • Friday

    Friday: Sunny, with a high near 58. East northeast wind around 6 mph becoming south in the morning.

    High: 58 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 40. East wind around 6 mph.

    Low: 40 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 9pm.  Otherwise, partly cloudy, with a low around 40.

    Low: 40 °F

    Patchy Fog

  • Sunday

    Sunday: Areas of fog before 11am.  Otherwise, mostly sunny, with a high near 60.

    High: 60 °F

    Areas Fog
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Widespread fog, mainly after 4am.  Otherwise, mostly cloudy, with a low around 42.

    Low: 42 °F

    Fog

Detailed Forecast

Tonight
Widespread dense fog, mainly after 2am. Otherwise, partly cloudy, with a low around 40. Light and variable wind.
Thursday
Widespread dense fog, mainly before 9am. Otherwise, sunny, with a high near 57. Calm wind becoming southwest around 5 mph in the afternoon.
Thursday Night
Patchy fog after 10pm. Otherwise, mostly clear, with a low around 40. Light and variable wind.
Friday
Sunny, with a high near 58. East northeast wind around 6 mph becoming south in the morning.
Friday Night
Mostly clear, with a low around 40. East wind around 6 mph.
Saturday
Sunny, with a high near 61.
Saturday Night
Patchy fog after 9pm. Otherwise, partly cloudy, with a low around 40.
Sunday
Areas of fog before 11am. Otherwise, mostly sunny, with a high near 60.
Sunday Night
Widespread fog, mainly after 4am. Otherwise, mostly cloudy, with a low around 42.
Monday
A slight chance of showers after 10am. Widespread fog, mainly before 8am. Otherwise, mostly cloudy, with a high near 59.
Monday Night
A chance of showers. Patchy fog. Otherwise, mostly cloudy, with a low around 48.
Tuesday
A chance of showers. Areas of fog. Otherwise, mostly cloudy, with a high near 61.
Tuesday Night
A chance of showers. Patchy fog. Otherwise, mostly cloudy, with a low around 49.
Wednesday
A slight chance of showers. Areas of fog. Otherwise, partly sunny, with a high near 62.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Napa CA
 38.27°N 122.28°W (Elev. 3 ft)
12:37 pm PST Dec 10, 2025
9pm PST Dec 10, 2025-6pm PST Dec 17, 2025
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database