Prolonged Extreme Cold; Eastern U.S. Winter Storm

Another Arctic blast will surge south across the northern Plains tonight, crossing the Midwest and reaching the Gulf Coast Friday night. Dangerously cold temperatures will persist across the eastern U.S. into early February. There is increasing confidence for significant heavy snow across much of the Southern Appalachians, Carolinas, and southern Mid-Atlantic Friday into Sunday. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

59°F

15°C

Humidity 64%
Wind Speed WSW 4 MPH
Barometer 30.32 in (1026.75 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 29 Jan 12:54 PM PST
Extended Forecast for

3 Miles SSE Lake Berryessa CA

  • This Afternoon

    This Afternoon: Sunny, with a high near 64. Calm wind.

    High: 64 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 43. Calm wind.

    Low: 43 °F

    Partly Cloudy

  • Friday

    Friday: Increasing clouds, with a high near 62. Light and variable wind.

    High: 62 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 43. Calm wind.

    Low: 43 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 64. Light east northeast wind.

    High: 64 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 45.

    Low: 45 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 64.

    High: 64 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 64. Calm wind.
Tonight
Partly cloudy, with a low around 43. Calm wind.
Friday
Increasing clouds, with a high near 62. Light and variable wind.
Friday Night
Mostly cloudy, with a low around 43. Calm wind.
Saturday
Partly sunny, with a high near 64. Light east northeast wind.
Saturday Night
Mostly cloudy, with a low around 45.
Sunday
Partly sunny, with a high near 64.
Sunday Night
Partly cloudy, with a low around 44.
Monday
Sunny, with a high near 66.
Monday Night
Mostly clear, with a low around 44.
Tuesday
Sunny, with a high near 66.
Tuesday Night
Mostly clear, with a low around 45.
Wednesday
Sunny, with a high near 67.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE Lake Berryessa CA
 38.53°N 122.23°W (Elev. 991 ft)
12:27 pm PST Jan 29, 2026
1pm PST Jan 29, 2026-6pm PST Feb 4, 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