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

52°F

11°C

Humidity 81%
Wind Speed SW 5 MPH
Barometer 30.2 in (1022.69 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 27 Dec 04:35 PM PST
Extended Forecast for

3 Miles NNW Lake Berryessa CA

  • Tonight

    Tonight: Partly cloudy, with a low around 37. West northwest wind around 6 mph.

    Low: 37 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 55. Light and variable wind becoming north around 6 mph in the morning.

    High: 55 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39. North wind 5 to 7 mph.

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 57. North northeast wind around 6 mph.

    High: 57 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 38. Calm wind.

    Low: 38 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

  • Wednesday

    Wednesday: A slight chance of rain after 4pm.  Patchy fog before 9am.  Otherwise, partly sunny, with a high near 58.

    High: 58 °F

    Patchy Fog
    then Slight
    Chance Rain

  • Wednesday Night

    Wednesday Night: A chance of rain, mainly after 10pm.  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. West northwest wind around 6 mph.
Sunday
Sunny, with a high near 55. Light and variable wind becoming north around 6 mph in the morning.
Sunday Night
Mostly clear, with a low around 39. North wind 5 to 7 mph.
Monday
Sunny, with a high near 57. North northeast wind around 6 mph.
Monday Night
Clear, with a low around 38. Calm wind.
Tuesday
Sunny, with a high near 57.
Tuesday Night
Mostly clear, with a low around 38.
Wednesday
A slight chance of rain after 4pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 58.
Wednesday Night
A chance of rain, mainly after 10pm. Patchy fog. Otherwise, mostly cloudy, with a low around 41.
New Year's Day
Rain likely, mainly after 10am. Areas of fog before 3pm. Otherwise, mostly cloudy, with a high near 54.
Thursday Night
Rain likely. Mostly cloudy, with a low around 43.
Friday
A chance of rain. Partly sunny, with a high near 54.
Friday Night
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 42.
Saturday
A chance of rain. Patchy fog. Otherwise, partly sunny, with a high near 55.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW Lake Berryessa CA
 38.61°N 122.28°W (Elev. 554 ft)
12:27 pm PST Dec 27, 2025
4pm PST Dec 27, 2025-6pm PST Jan 3, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database