National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Significant and Catastrophic Flooding in the Pacific Northwest; Very Cold Temperatures in the Northern Plains

The atmospheric river over the Pacific Northwest will begin to subside today, but lingering rainfall will exacerbate ongoing catastrophic major river flooding, and landslides will continue across portions of western Washington and northwest Oregon for several days. Arctic air will plummet southward into the Northern Plains today, bringing cold air in the single digits to the region by Friday. 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 13 MPH
Barometer 30.18 in (1022.01 mb)
Dewpoint 43°F (6°C)
Visibility 5.00 mi
Wind Chill36°F (2°C)
Last update 11 Dec 07:00 AM PST
Extended Forecast for

Sonoma CA

  • Today

    Today: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 53. Calm wind becoming south southeast around 5 mph.

    High: 53 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: Patchy dense fog after 9pm. Otherwise, partly cloudy, with a low around 39. Calm wind.

    Low: 39 °F

    Patchy Dense
    Fog

  • Friday

    Friday: Patchy dense fog before 11am. Otherwise, sunny, with a high near 56. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 56 °F

    Patchy Dense
    Fog then
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 39. Calm wind.

    Low: 39 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 61. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 61 °F

    Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 10pm. Otherwise, mostly clear, with a low around 39.

    Low: 39 °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: Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 41.

    Low: 41 °F

    Partly Cloudy
    then Patchy
    Fog

  • Monday

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

    High: 60 °F

    Areas Fog
    then Mostly
    Cloudy

Detailed Forecast

Today
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 53. Calm wind becoming south southeast around 5 mph.
Tonight
Patchy dense fog after 9pm. Otherwise, partly cloudy, with a low around 39. Calm wind.
Friday
Patchy dense fog before 11am. Otherwise, sunny, with a high near 56. Calm wind becoming south southeast around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 39. Calm wind.
Saturday
Sunny, with a high near 61. Calm wind becoming south southeast around 5 mph in the afternoon.
Saturday Night
Patchy fog after 10pm. Otherwise, mostly clear, with a low around 39.
Sunday
Areas of fog before 11am. Otherwise, mostly sunny, with a high near 60.
Sunday Night
Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 41.
Monday
Areas of fog before 11am. Otherwise, mostly cloudy, with a high near 60.
Monday Night
A chance of rain. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 47.
Tuesday
A chance of rain. Widespread fog. Otherwise, mostly cloudy, with a high near 61.
Tuesday Night
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 49.
Wednesday
A chance of rain. Areas of fog. Otherwise, mostly cloudy, with a high near 59.
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ABOUT THIS FORECAST

 
Point Forecast:
Sonoma CA
 38.29°N 122.46°W (Elev. 72 ft)
Last Update:
2:25 am PST Dec 11, 2025
Forecast Valid:
7am PST Dec 11, 2025-6pm PST Dec 17, 2025
 
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Additional Resources

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Chance of Precipitation