Prolonged Atmospheric River in the Northwest; Snow in the North-Central US

A prolonged atmospheric river will bring heavy rainfall which may lead to widespread urban and river flooding, heavy mountain snow, along with gusty winds to the Pacific Northwest into the northern Rockies through much of the week. A clipper will bring a period of snow across the upper Midwest and the Great Lakes into Tuesday, before a stronger system bring more wintry impacts. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Overcast

43°F

6°C

Humidity 100%
Wind Speed ENE 3 MPH
Barometer 30.31 in (1026.41 mb)
Dewpoint 43°F (6°C)
Visibility 8.00 mi
Last update 09 Dec 12:20 AM PST
Extended Forecast for

7 Miles SW Lake Berryessa CA

  • Overnight

    Overnight: Mostly clear, with a low around 44. Calm wind.

    Low: 44 °F

    Mostly Clear

  • Tuesday

    Tuesday: Patchy fog before 9am.  Otherwise, sunny, with a high near 62. Calm wind.

    High: 62 °F

    Patchy Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 47. Calm wind.

    Low: 47 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 64. Light north northeast wind.

    High: 64 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 47. Calm wind.

    Low: 47 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 44. Calm wind.
Tuesday
Patchy fog before 9am. Otherwise, sunny, with a high near 62. Calm wind.
Tuesday Night
Mostly clear, with a low around 47. Calm wind.
Wednesday
Sunny, with a high near 64. Light north northeast wind.
Wednesday Night
Mostly clear, with a low around 47. Calm wind.
Thursday
Sunny, with a high near 66.
Thursday Night
Mostly clear, with a low around 46.
Friday
Sunny, with a high near 63.
Friday Night
Mostly clear, with a low around 43.
Saturday
Sunny, with a high near 60.
Saturday Night
Partly cloudy, with a low around 43.
Sunday
Patchy fog. Otherwise, mostly sunny, with a high near 57.
Sunday Night
A slight chance of rain. Mostly cloudy, with a low around 46.
Monday
A chance of rain. Partly sunny, with a high near 57.
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ABOUT THIS FORECAST

 
Point Forecast:
7 Miles SW Lake Berryessa CA
 38.51°N 122.34°W (Elev. 699 ft)
12:26 am PST Dec 9, 2025
12am PST Dec 9, 2025-6pm PST Dec 15, 2025
 
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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