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

41°F

5°C

Humidity 100%
Wind Speed N 0 MPH
Barometer 30.26 in (1024.72 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 27 Dec 08:55 PM PST
Extended Forecast for

Napa Co. Airport CA

  • Tonight

    Tonight: Partly cloudy, with a low around 37. Calm wind.

    Low: 37 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, then gradually becoming sunny, with a high near 54. Calm wind becoming north northeast around 6 mph in the afternoon.

    High: 54 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Patchy frost after 4am. Otherwise, mostly clear, with a low around 36. Light northeast wind.

    Low: 36 °F

    Mostly Clear
    then Patchy
    Frost

  • Monday

    Monday: Areas of frost before 8am. Otherwise, sunny, with a high near 53. East northeast wind 5 to 7 mph.

    High: 53 °F

    Areas Frost
    then Sunny

  • Monday Night

    Monday Night: Patchy fog after 2am. Patchy frost after 4am. Otherwise, mostly clear, with a low around 36. Calm wind.

    Low: 36 °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 fog after 10pm. Otherwise, partly cloudy, with a low around 37.

    Low: 37 °F

    Patchy Fog

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 53.

    High: 53 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 41.

    Low: 41 °F

    Chance Rain
    and Patchy
    Fog

Detailed Forecast

Tonight
Partly cloudy, with a low around 37. Calm wind.
Sunday
Partly sunny, then gradually becoming sunny, with a high near 54. Calm wind becoming north northeast around 6 mph in the afternoon.
Sunday Night
Patchy frost after 4am. Otherwise, mostly clear, with a low around 36. Light northeast wind.
Monday
Areas of frost before 8am. Otherwise, sunny, with a high near 53. East northeast wind 5 to 7 mph.
Monday Night
Patchy fog after 2am. Patchy frost after 4am. Otherwise, mostly clear, with a low around 36. Calm wind.
Tuesday
Patchy fog before 7am. Patchy frost before 8am. Otherwise, sunny, with a high near 53.
Tuesday Night
Patchy fog after 10pm. Otherwise, partly cloudy, with a low around 37.
Wednesday
Mostly cloudy, with a high near 53.
Wednesday Night
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 41.
New Year's Day
Rain likely, mainly after 10am. Patchy fog before 10am. Otherwise, cloudy, with a high near 52.
Thursday Night
Rain likely. Cloudy, with a low around 44.
Friday
A chance of rain. Mostly cloudy, with a high near 52.
Friday Night
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 43.
Saturday
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a high near 52.
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ABOUT THIS FORECAST

 
Point Forecast:
Napa Co. Airport CA
 38.22°N 122.3°W (Elev. 3 ft)
Last Update:
12:27 pm PST Dec 27, 2025
Forecast Valid:
9pm PST Dec 27, 2025-6pm PST Jan 3, 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