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

35°F

2°C

Humidity 100%
Wind Speed N 0 MPH
Barometer 30.3 in (1026.08 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Last update 28 Dec 05:54 AM PST
Extended Forecast for

3 Miles NNW Vallejo CA

  • Today

    Today: Partly sunny, then gradually becoming sunny, with a high near 52. Calm wind becoming north around 6 mph in the morning.

    High: 52 °F

    Becoming
    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 36. Northeast wind around 6 mph.

    Low: 36 °F

    Mostly Clear

  • Monday

    Monday: Patchy frost before 8am.  Otherwise, sunny, with a high near 51. East northeast wind around 8 mph.

    High: 51 °F

    Patchy Frost
    then Sunny

  • Monday Night

    Monday Night: Patchy frost after 4am.  Otherwise, mostly clear, with a low around 36. Northeast wind 3 to 5 mph.

    Low: 36 °F

    Mostly Clear
    then Patchy
    Frost

  • Tuesday

    Tuesday: Patchy frost before 7am.  Otherwise, sunny, with a high near 52. East northeast wind 7 to 9 mph.

    High: 52 °F

    Patchy Frost
    then Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 51.

    High: 51 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A chance of rain.  Cloudy, with a low around 41.

    Low: 41 °F

    Chance Rain

  • New Year's Day

    New Year's Day: Rain likely, mainly after 10am.  Cloudy, with a high near 50.

    High: 50 °F

    Rain Likely

Detailed Forecast

Today
Partly sunny, then gradually becoming sunny, with a high near 52. Calm wind becoming north around 6 mph in the morning.
Tonight
Mostly clear, with a low around 36. Northeast wind around 6 mph.
Monday
Patchy frost before 8am. Otherwise, sunny, with a high near 51. East northeast wind around 8 mph.
Monday Night
Patchy frost after 4am. Otherwise, mostly clear, with a low around 36. Northeast wind 3 to 5 mph.
Tuesday
Patchy frost before 7am. Otherwise, sunny, with a high near 52. East northeast wind 7 to 9 mph.
Tuesday Night
Partly cloudy, with a low around 38.
Wednesday
Mostly cloudy, with a high near 51.
Wednesday Night
A chance of rain. Cloudy, with a low around 41.
New Year's Day
Rain likely, mainly after 10am. Cloudy, with a high near 50.
Thursday Night
Rain likely. Cloudy, with a low around 45.
Friday
A chance of rain. Mostly cloudy, with a high near 51.
Friday Night
A chance of rain. Mostly cloudy, with a low around 44.
Saturday
A chance of rain. Mostly cloudy, with a high near 51.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW Vallejo CA
 38.18°N 122.26°W (Elev. 56 ft)
12:27 am PST Dec 28, 2025
6am PST Dec 28, 2025-6pm PST Jan 3, 2026
 
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Additional Resources

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Hourly Weather Forecast

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