Another Arctic Blast in the East; Eastern U.S. Winter Storm

A powerful Arctic blast will bring dangerously cold, record low temperatures to the upper Ohio Valley, Mid-Atlantic, Gulf Coast and Southeast U.S. this weekend. A rapidly deepening storm will produce widespread heavy snow and wind from the southern Appalachians across the Carolinas and southern Virginia into Sunday. Storm-force winds and coastal flooding will be possible along the East Coast. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

39°F

4°C

Humidity 100%
Wind Speed N 0 MPH
Barometer 30.24 in (1024.04 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 31 Jan 04:00 AM PST
Extended Forecast for

5 Miles SSE Lake Berryessa CA

  • Today

    Today: Partly sunny, with a high near 66. Calm wind.

    High: 66 °F

    Partly Sunny

  • Tonight

    Tonight: Patchy fog after 4am.  Otherwise, mostly cloudy, with a low around 45. Calm wind.

    Low: 45 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Sunday

    Sunday: Patchy fog before 9am.  Otherwise, partly sunny, with a high near 66. Calm wind.

    High: 66 °F

    Patchy Fog
    then Partly
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 43. Northwest wind 6 to 8 mph.

    Low: 43 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 68. Northwest wind 5 to 7 mph becoming calm  in the morning.

    High: 68 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 70.

    High: 70 °F

    Sunny

Detailed Forecast

Today
Partly sunny, with a high near 66. Calm wind.
Tonight
Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 45. Calm wind.
Sunday
Patchy fog before 9am. Otherwise, partly sunny, with a high near 66. Calm wind.
Sunday Night
Mostly clear, with a low around 43. Northwest wind 6 to 8 mph.
Monday
Sunny, with a high near 68. Northwest wind 5 to 7 mph becoming calm in the morning.
Monday Night
Mostly clear, with a low around 44.
Tuesday
Sunny, with a high near 68.
Tuesday Night
Mostly clear, with a low around 45.
Wednesday
Sunny, with a high near 70.
Wednesday Night
Mostly clear, with a low around 45.
Thursday
Sunny, with a high near 69.
Thursday Night
Partly cloudy, with a low around 47.
Friday
Sunny, with a high near 69.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSE Lake Berryessa CA
 38.53°N 122.2°W (Elev. 440 ft)
4:03 am PST Jan 31, 2026
4am PST Jan 31, 2026-6pm PST Feb 6, 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