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

Storm Systems to Impact the Central and Eastern U.S. Through the Weekend

Two storm systems will track through the central and eastern U.S. today through this weekend with areas of gusty winds, rain and heavy snow. Severe thunderstorms and heavy to excessive rainfall is forecast today from the Lower Mississippi River Valley to the Tennessee Valley. Damaging winds, a few tornadoes, and areas of flooding are possible. Read More >

Hazardous Weather Conditions

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

36°F

2°C

Humidity 74%
Wind Speed N 0 MPH
Barometer 30.42 in (1030.14 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 09 Jan 08:20 AM PST
Extended Forecast for

Sonoma CA

Cold Weather Advisory January 9, 08:40am until January 9, 09:00am
Click here for hazard details and duration
...
  •  
    Cold Weather Advisory January 9, 08:40am until January 9, 09:00am

    NOW until 9:00am Fri

    Cold Weather Advisory

  • Today

    High: 55 °F

    Areas Frost
    then Sunny

  • Tonight

    Tonight: Patchy frost after 1am. Otherwise, mostly clear, with a low around 34. Calm wind.

    Low: 34 °F

    Mostly Clear
    then Patchy
    Frost

  • Saturday

    Saturday: Widespread frost, mainly before 7am. Otherwise, partly sunny, with a high near 55. Calm wind becoming east northeast around 6 mph in the afternoon.

    High: 55 °F

    Frost then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 34. Calm wind.

    Low: 34 °F

    Mostly Cloudy

  • Sunday

    Sunday: Areas of frost before 9am. Otherwise, partly sunny, with a high near 56. Light east northeast wind.

    High: 56 °F

    Areas Frost
    then Partly
    Sunny

  • Sunday Night

    Sunday Night: Patchy fog after midnight. Patchy frost after 5am. Otherwise, partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy
    then Patchy
    Frost and
    Patchy Fog

  • Monday

    Monday: Patchy fog before 9am. Patchy frost before 8am. Otherwise, sunny, with a high near 58.

    High: 58 °F

    Patchy Frost
    and Patchy
    Fog then
    Sunny

  • Monday Night

    Monday Night: Patchy fog after midnight. Otherwise, mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear
    then Patchy
    Fog

Detailed Forecast

Today
Areas of frost before 9am. Otherwise, sunny, with a high near 55. Calm wind becoming east around 6 mph in the afternoon.
Tonight
Patchy frost after 1am. Otherwise, mostly clear, with a low around 34. Calm wind.
Saturday
Widespread frost, mainly before 7am. Otherwise, partly sunny, with a high near 55. Calm wind becoming east northeast around 6 mph in the afternoon.
Saturday Night
Mostly cloudy, with a low around 34. Calm wind.
Sunday
Areas of frost before 9am. Otherwise, partly sunny, with a high near 56. Light east northeast wind.
Sunday Night
Patchy fog after midnight. Patchy frost after 5am. Otherwise, partly cloudy, with a low around 36.
Monday
Patchy fog before 9am. Patchy frost before 8am. Otherwise, sunny, with a high near 58.
Monday Night
Patchy fog after midnight. Otherwise, mostly clear, with a low around 39.
Tuesday
Patchy fog before 9am. Otherwise, sunny, with a high near 61.
Tuesday Night
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 41.
Wednesday
Patchy fog. Otherwise, sunny, with a high near 62.
Wednesday Night
Patchy fog. Otherwise, mostly clear, with a low around 43.
Thursday
Patchy fog. Otherwise, sunny, with a high near 64.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sonoma CA
 38.29°N 122.46°W (Elev. 72 ft)
Last Update:
12:26 am PST Jan 9, 2026
Forecast Valid:
8am PST Jan 9, 2026-6pm PST Jan 15, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation