Powerful Winter Storm from the Upper Midwest into the Northeast; Severe Thunderstorms in the Midwest and Ohio Valley

A rapidly-intensifying storm is expected to bring heavy snow, blizzard conditions, and icing from the Upper Midwest through the Great Lakes and Northeast. Scattered severe thunderstorms may produce severe/damaging wind gusts and a couple of tornadoes across parts of the Midwest and lower Ohio Valley through the evening. Arctic air will expand across the central and southern U.S.. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

53°F

12°C

Humidity 66%
Wind Speed SW 5 MPH
Barometer 30.28 in (1025.4 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 28 Dec 12:54 PM PST
Extended Forecast for

Napa CA

Cold Weather Advisory December 29, 01:00am until December 29, 09:00am
Click here for hazard details and duration
Cold Weather Advisory
  • This Afternoon

    This Afternoon: Sunny, with a high near 56. Light east northeast wind.

    High: 56 °F

    Sunny

  • Tonight

    Tonight: Patchy frost between 4am and 5am.  Otherwise, mostly clear, with a low around 37. Calm wind.

    Low: 37 °F

    Mostly Clear
    then Patchy
    Frost

  • Monday

    Monday: Sunny, with a high near 55. Calm wind becoming east northeast around 6 mph in the morning.

    High: 55 °F

    Sunny

  • Monday Night

    Monday Night: Patchy fog before 9pm, then patchy fog after midnight. Patchy frost after 5am.  Otherwise, mostly clear, with a low around 36. Calm wind.

    Low: 36 °F

    Patchy Fog
    then Patchy
    Frost and
    Patchy Fog

  • Tuesday

    Tuesday: Areas of fog before 10am. Patchy frost before 7am.  Otherwise, sunny, with a high near 54. Calm wind becoming east northeast around 6 mph in the morning.

    High: 54 °F

    Patchy Frost
    and Areas Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog.  Otherwise, mostly cloudy, with a low around 37.

    Low: 37 °F

    Patchy Fog

  • Wednesday

    Wednesday: A 10 percent chance of rain after 4pm.  Areas of fog before 10am.  Otherwise, partly sunny, with a high near 53.

    High: 53 °F

    Areas Fog
    then Slight
    Chance Rain

  • Wednesday Night

    Wednesday Night: A chance of rain, mainly after 10pm.  Widespread fog, mainly between 2am and 4am.  Otherwise, mostly cloudy, with a low around 42.

    Low: 42 °F

    Chance Rain
    and Fog

  • New Year's Day

    New Year's Day: Rain likely, mainly after 10am.  Areas of fog before 1pm.  Otherwise, mostly cloudy, with a high near 50.

    High: 50 °F

    Rain Likely
    and Areas Fog

Detailed Forecast

This Afternoon
Sunny, with a high near 56. Light east northeast wind.
Tonight
Patchy frost between 4am and 5am. Otherwise, mostly clear, with a low around 37. Calm wind.
Monday
Sunny, with a high near 55. Calm wind becoming east northeast around 6 mph in the morning.
Monday Night
Patchy fog before 9pm, then patchy fog after midnight. Patchy frost after 5am. Otherwise, mostly clear, with a low around 36. Calm wind.
Tuesday
Areas of fog before 10am. Patchy frost before 7am. Otherwise, sunny, with a high near 54. Calm wind becoming east northeast around 6 mph in the morning.
Tuesday Night
Patchy fog. Otherwise, mostly cloudy, with a low around 37.
Wednesday
A 10 percent chance of rain after 4pm. Areas of fog before 10am. Otherwise, partly sunny, with a high near 53.
Wednesday Night
A chance of rain, mainly after 10pm. Widespread fog, mainly between 2am and 4am. Otherwise, mostly cloudy, with a low around 42.
New Year's Day
Rain likely, mainly after 10am. Areas of fog before 1pm. Otherwise, mostly cloudy, with a high near 50.
Thursday Night
Rain likely. Areas of fog after 7pm. Otherwise, cloudy, with a low around 46.
Friday
Rain likely. Patchy fog. Otherwise, mostly cloudy, with a high near 54.
Friday Night
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 46.
Saturday
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a high near 54.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Napa CA
 38.29°N 122.29°W (Elev. 20 ft)
12:27 pm PST Dec 28, 2025
1pm PST Dec 28, 2025-6pm PST Jan 3, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database