National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Heavy Rain and Mountain Snow Lingers in California; Winter Storm Impacting the Great Lakes and Northeast U.S.

An atmospheric river will wind down through today across California with lingering heavy rainfall, heavy mountain snow, and gusty winds. A wintry mix of freezing rain, sleet, and snow will cause hazardous travel conditions for the Great Lakes into the northern Mid-Atlantic and southern New England today through Saturday morning. Areas of tree damage and power outages are possible. Read More >

Hazardous Weather Conditions

Current conditions at

Napa, Napa County Airport (KAPC)

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

Partly Cloudy

53°F

12°C

Humidity 79%
Wind Speed S 11 MPH
Barometer 29.89 in (1012.19 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 26 Dec 07:54 AM PST
Extended Forecast for

4 Miles N Sonoma CA

Flood Watch December 26, 08:03am until December 26, 10:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch December 26, 08:03am until December 26, 10:00pm

    NOW until 10:00pm Fri

    Flood Watch

  • Today

    High: 47 °F

    Showers
    Likely

  • Tonight

    Tonight: A 40 percent chance of showers before 1am. Partly cloudy, with a low around 42. West wind around 7 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 42 °F

    Chance
    Showers

  • Saturday

    Saturday: Sunny, with a high near 47. North wind around 7 mph.

    High: 47 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 40. North northwest wind 5 to 7 mph.

    Low: 40 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 49. North northeast wind around 7 mph.

    High: 49 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 50.

    High: 50 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 40.

    Low: 40 °F

    Clear

Detailed Forecast

Today
Showers likely before 1pm, then showers likely and possibly a thunderstorm between 1pm and 3pm, then a chance of showers and thunderstorms after 3pm. Mostly cloudy, with a high near 47. South wind 8 to 17 mph, with gusts as high as 31 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
A 40 percent chance of showers before 1am. Partly cloudy, with a low around 42. West wind around 7 mph. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Sunny, with a high near 47. North wind around 7 mph.
Saturday Night
Mostly clear, with a low around 40. North northwest wind 5 to 7 mph.
Sunday
Sunny, with a high near 49. North northeast wind around 7 mph.
Sunday Night
Mostly clear, with a low around 39.
Monday
Sunny, with a high near 50.
Monday Night
Clear, with a low around 40.
Tuesday
Sunny, with a high near 51.
Tuesday Night
Mostly clear, with a low around 41.
Wednesday
Mostly sunny, with a high near 51.
Wednesday Night
A slight chance of showers. Mostly cloudy, with a low around 44.
New Year's Day
A chance of showers. Mostly cloudy, with a high near 50.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles N Sonoma CA
 38.36°N 122.45°W (Elev. 1818 ft)
Last Update:
3:07 am PST Dec 26, 2025
Forecast Valid:
8am PST Dec 26, 2025-6pm PST Jan 1, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation