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

Tracking Winter Weather and Frigid Temperatures Through This Weekend

A clipper storm will move across the Great Lakes through this weekend with periods of light snow, gusty winds, and lake effect snow bands which could make for hazardous travel at times. A frigid airmass will spread eastward behind this storm into the Midwest and Eastern U.S. through the weekend. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Mist

39°F

4°C

Humidity 100%
Wind Speed N 3 MPH
Barometer 30.13 in (1020.32 mb)
Dewpoint 39°F (4°C)
Visibility 4.00 mi
Last update 17 Jan 03:35 AM PST
Extended Forecast for

Sonoma CA

  • Overnight

    Overnight: Mostly clear, with a low around 37. Calm wind.

    Low: 37 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 64. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 64 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 40. Calm wind.

    Low: 40 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 65. Light east wind.

    High: 65 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Patchy fog. Otherwise, mostly clear, with a low around 40. Calm wind.

    Low: 40 °F

    Patchy Fog

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 64.

    High: 64 °F

    Sunny

  • Monday Night

    Monday Night: Patchy fog after 5am. Otherwise, mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear
    then Patchy
    Fog

  • Tuesday

    Tuesday: Patchy fog before 10am. Otherwise, sunny, with a high near 63.

    High: 63 °F

    Patchy Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog after 10pm. Otherwise, partly cloudy, with a low around 40.

    Low: 40 °F

    Patchy Fog

Detailed Forecast

Overnight
Mostly clear, with a low around 37. Calm wind.
Saturday
Mostly sunny, with a high near 64. Calm wind becoming east southeast around 5 mph in the afternoon.
Saturday Night
Mostly cloudy, with a low around 40. Calm wind.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 65. Light east wind.
Sunday Night
Patchy fog. Otherwise, mostly clear, with a low around 40. Calm wind.
M.L.King Day
Sunny, with a high near 64.
Monday Night
Patchy fog after 5am. Otherwise, mostly clear, with a low around 40.
Tuesday
Patchy fog before 10am. Otherwise, sunny, with a high near 63.
Tuesday Night
Patchy fog after 10pm. Otherwise, partly cloudy, with a low around 40.
Wednesday
Areas of fog before 9am. Otherwise, mostly sunny, with a high near 62.
Wednesday Night
Patchy fog. Otherwise, mostly cloudy, with a low around 42.
Thursday
Areas of fog. Otherwise, partly sunny, with a high near 59.
Thursday Night
Areas of fog. Otherwise, mostly cloudy, with a low around 42.
Friday
Areas of fog. Otherwise, mostly sunny, with a high near 58.
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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:
1:13 am PST Jan 17, 2026
Forecast Valid:
3am PST Jan 17, 2026-6pm PST Jan 23, 2026
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation