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

Tracking Late December Winter Storm Expected to Impact the Northern Plains through the Northeast U.S.

A winter storm system will rapidly intensify over the Midwest on Sunday and track through the Great Lakes on Monday. Periods of heavy snow are anticipated across the Upper Great Lakes late Sunday and continuing into Monday. At least 1/10 inch of ice accumulation is expected from a wintry mix across much of the interior Northeast U.S. starting Sunday afternoon. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

55°F

13°C

Humidity 71%
Wind Speed SSW 8 MPH
Barometer 30.17 in (1021.67 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 27 Dec 02:35 PM PST
Extended Forecast for

Sonoma CA

  • This Afternoon

    This Afternoon: Sunny, with a high near 54. North wind around 5 mph.

    High: 54 °F

    Sunny

  • Tonight

    Tonight: Patchy fog after 1am. Areas of frost before 4am, then patchy frost after 5am. Otherwise, partly cloudy, with a low around 36. Calm wind.

    Low: 36 °F

    Mostly Clear
    then Areas
    Frost and
    Patchy Fog

  • Sunday

    Sunday: Patchy frost before 8am. Otherwise, sunny, with a high near 54. Light and variable wind.

    High: 54 °F

    Patchy Frost
    then Sunny

  • Sunday Night

    Sunday Night: Patchy frost after 2am. Otherwise, mostly clear, with a low around 35. Calm wind.

    Low: 35 °F

    Mostly Clear
    then Patchy
    Frost

  • Monday

    Monday: Areas of frost before 9am. Otherwise, sunny, with a high near 54. Calm wind becoming east northeast around 6 mph in the afternoon.

    High: 54 °F

    Areas Frost
    then Sunny

  • Monday Night

    Monday Night: Patchy fog after 5am. Patchy frost after 2am. Otherwise, mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear
    then Patchy
    Frost and
    Patchy Fog

  • Tuesday

    Tuesday: Patchy fog before 10am. Areas of frost before 8am. Otherwise, sunny, with a high near 55.

    High: 55 °F

    Areas Frost
    and Patchy
    Fog then
    Sunny

  • Tuesday Night

    Tuesday Night: Areas of fog. Otherwise, partly cloudy, with a low around 36.

    Low: 36 °F

    Areas Fog

  • Wednesday

    Wednesday: Areas of fog before 10am. Otherwise, mostly cloudy, with a high near 54.

    High: 54 °F

    Areas Fog
    then Mostly
    Cloudy

Detailed Forecast

This Afternoon
Sunny, with a high near 54. North wind around 5 mph.
Tonight
Patchy fog after 1am. Areas of frost before 4am, then patchy frost after 5am. Otherwise, partly cloudy, with a low around 36. Calm wind.
Sunday
Patchy frost before 8am. Otherwise, sunny, with a high near 54. Light and variable wind.
Sunday Night
Patchy frost after 2am. Otherwise, mostly clear, with a low around 35. Calm wind.
Monday
Areas of frost before 9am. Otherwise, sunny, with a high near 54. Calm wind becoming east northeast around 6 mph in the afternoon.
Monday Night
Patchy fog after 5am. Patchy frost after 2am. Otherwise, mostly clear, with a low around 36.
Tuesday
Patchy fog before 10am. Areas of frost before 8am. Otherwise, sunny, with a high near 55.
Tuesday Night
Areas of fog. Otherwise, partly cloudy, with a low around 36.
Wednesday
Areas of fog before 10am. Otherwise, mostly cloudy, with a high near 54.
Wednesday Night
A chance of rain. Patchy fog. Otherwise, cloudy, with a low around 40.
New Year's Day
Rain likely. Areas of fog. Otherwise, cloudy, with a high near 51.
Thursday Night
Rain likely. Patchy fog. Otherwise, cloudy, with a low around 42.
Friday
A chance of rain. Patchy fog. Otherwise, partly sunny, with a high near 52.
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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:
12:27 pm PST Dec 27, 2025
Forecast Valid:
2pm PST Dec 27, 2025-6pm PST Jan 2, 2026
 
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