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.

Fog

36°F

2°C

Humidity 100%
Wind Speed N 0 MPH
Barometer 30.09 in (1018.96 mb)
Dewpoint 36°F (2°C)
Visibility 0.50 mi
Last update 27 Dec 05:10 AM PST
Extended Forecast for

Napa CA

  • Today

    Today: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 52. Calm wind becoming north around 5 mph in the afternoon.

    High: 52 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 36. Calm wind.

    Low: 36 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly cloudy through mid morning, then gradual clearing, with a high near 52. Calm wind becoming north northeast around 5 mph in the afternoon.

    High: 52 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Patchy frost after 2am. Otherwise, mostly clear, with a low around 36. Calm wind.

    Low: 36 °F

    Mostly Clear
    then Patchy
    Frost

  • Monday

    Monday: Areas of frost before 8am. Otherwise, sunny, with a high near 54. East northeast wind 3 to 6 mph.

    High: 54 °F

    Areas Frost
    then Sunny

  • Monday Night

    Monday Night: Patchy fog after 3am. Patchy frost after 5am. Otherwise, mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear
    then Patchy
    Frost and
    Patchy Fog

  • Tuesday

    Tuesday: Patchy fog before 7am. Patchy frost before 8am. Otherwise, sunny, with a high near 53.

    High: 53 °F

    Patchy Frost
    and Patchy
    Fog then
    Sunny

  • Tuesday Night

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

    Low: 36 °F

    Mostly Clear
    then Patchy
    Frost

  • Wednesday

    Wednesday: Patchy fog before 10am. Otherwise, mostly sunny, with a high near 53.

    High: 53 °F

    Patchy Fog
    then Mostly
    Sunny

Detailed Forecast

Today
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 52. Calm wind becoming north around 5 mph in the afternoon.
Tonight
Increasing clouds, with a low around 36. Calm wind.
Sunday
Mostly cloudy through mid morning, then gradual clearing, with a high near 52. Calm wind becoming north northeast around 5 mph in the afternoon.
Sunday Night
Patchy frost after 2am. Otherwise, mostly clear, with a low around 36. Calm wind.
Monday
Areas of frost before 8am. Otherwise, sunny, with a high near 54. East northeast wind 3 to 6 mph.
Monday Night
Patchy fog after 3am. Patchy frost after 5am. Otherwise, mostly clear, with a low around 35.
Tuesday
Patchy fog before 7am. Patchy frost before 8am. Otherwise, sunny, with a high near 53.
Tuesday Night
Patchy frost after 5am. Otherwise, mostly clear, with a low around 36.
Wednesday
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 53.
Wednesday Night
A slight chance of rain after 10pm. Patchy fog. Otherwise, mostly cloudy, with a low around 39.
New Year's Day
A chance of rain. Areas of fog. Otherwise, cloudy, with a high near 51.
Thursday Night
A chance of rain. Patchy fog. Otherwise, cloudy, with a low around 42.
Friday
A chance of rain. Partly sunny, with a high near 52.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Napa CA
 38.29°N 122.29°W (Elev. 20 ft)
Last Update:
12:27 am PST Dec 27, 2025
Forecast Valid:
5am PST Dec 27, 2025-6pm PST Jan 2, 2026
 
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