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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 >

Hazardous Weather Conditions

Current conditions at

Napa, Napa County Airport (KAPC)

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

Mist

37°F

3°C

Humidity 100%
Wind Speed N 0 MPH
Barometer 30.08 in (1018.63 mb)
Dewpoint 37°F (3°C)
Visibility 0.75 mi
Last update 16 Jan 06:54 AM PST
Extended Forecast for

Sonoma CA

Dense Fog Advisory January 16, 07:10am until January 16, 09:00am
Click here for hazard details and duration
...
  •  
    Dense Fog Advisory January 16, 07:10am until January 16, 09:00am

    NOW until 9:00am Fri

    Dense Fog Advisory

  • Today

    High: 65 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 41. North northeast wind around 5 mph becoming calm after midnight.

    Low: 41 °F

    Mostly Clear

  • Saturday

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

    High: 64 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 41. Calm wind.

    Low: 41 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 64. Light east northeast wind.

    High: 64 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Patchy fog after 1am. Otherwise, mostly clear, with a low around 40.

    Low: 40 °F

    Partly Cloudy
    then Patchy
    Fog

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 63.

    High: 63 °F

    Mostly Sunny

  • Monday Night

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

    Low: 40 °F

    Patchy Fog

Detailed Forecast

Today
Sunny, with a high near 65. East northeast wind 5 to 11 mph, with gusts as high as 21 mph.
Tonight
Mostly clear, with a low around 41. North northeast wind around 5 mph becoming calm after midnight.
Saturday
Mostly sunny, with a high near 64. Calm wind becoming southeast around 5 mph in the morning.
Saturday Night
Mostly cloudy, with a low around 41. Calm wind.
Sunday
Partly sunny, with a high near 64. Light east northeast wind.
Sunday Night
Patchy fog after 1am. Otherwise, mostly clear, with a low around 40.
M.L.King Day
Mostly sunny, with a high near 63.
Monday Night
Patchy fog after 10pm. Otherwise, partly cloudy, with a low around 40.
Tuesday
Areas of fog before 9am. Otherwise, mostly sunny, with a high near 61.
Tuesday Night
Patchy fog. Otherwise, mostly cloudy, with a low around 41.
Wednesday
Areas of fog. Otherwise, partly sunny, with a high near 59.
Wednesday Night
Widespread fog. Otherwise, mostly cloudy, with a low around 42.
Thursday
Widespread fog. Otherwise, partly sunny, with a high near 58.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sonoma CA
 38.29°N 122.46°W (Elev. 72 ft)
Last Update:
12:26 am PST Jan 16, 2026
Forecast Valid:
7am PST Jan 16, 2026-6pm PST Jan 22, 2026
 
Forecast Discussion
 
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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