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.

Mostly Cloudy

54°F

12°C

Humidity 76%
Wind Speed SSW 13 MPH
Barometer 29.86 in (1011.18 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 26 Dec 04:20 AM PST
Extended Forecast for

Napa CA

Flood Watch December 26, 04:43am until December 26, 10:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch December 26, 04:43am until December 26, 10:00pm

    NOW until 10:00pm Fri

    Flood Watch

  • Today

    High: 53 °F

    Showers
    Likely

  • Tonight

    Tonight: A 30 percent chance of showers, mainly before midnight. Patchy fog after 2am. Otherwise, partly cloudy, with a low around 41. South southwest wind around 5 mph becoming calm in the evening.

    Low: 41 °F

    Chance
    Showers and
    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 51. Calm wind becoming north around 5 mph in the afternoon.

    High: 51 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 36. Calm wind.

    Low: 36 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 52. Calm wind becoming north northeast around 6 mph in the morning.

    High: 52 °F

    Sunny

  • Sunday Night

    Sunday Night: Patchy frost after 3am. Otherwise, mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear
    then Patchy
    Frost

  • Monday

    Monday: Areas of frost before 8am. Otherwise, sunny, with a high near 53.

    High: 53 °F

    Areas Frost
    then Sunny

  • Monday Night

    Monday Night: Patchy fog after 4am. Patchy frost after 4am. Otherwise, mostly clear, with a low around 34.

    Low: 34 °F

    Mostly Clear
    then Patchy
    Frost and
    Patchy Fog

Detailed Forecast

Today
Showers and thunderstorms likely, mainly before 3pm. Mostly cloudy, with a high near 53. South wind 7 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
A 30 percent chance of showers, mainly before midnight. Patchy fog after 2am. Otherwise, partly cloudy, with a low around 41. South southwest wind around 5 mph becoming calm in the evening.
Saturday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 51. Calm wind becoming north around 5 mph in the afternoon.
Saturday Night
Increasing clouds, with a low around 36. Calm wind.
Sunday
Sunny, with a high near 52. Calm wind becoming north northeast around 6 mph in the morning.
Sunday Night
Patchy frost after 3am. Otherwise, mostly clear, with a low around 36.
Monday
Areas of frost before 8am. Otherwise, sunny, with a high near 53.
Monday Night
Patchy fog after 4am. Patchy frost after 4am. Otherwise, mostly clear, with a low around 34.
Tuesday
Patchy fog before 7am. Patchy frost before 8am. Otherwise, sunny, with a high near 53.
Tuesday Night
Patchy fog before 10pm, then patchy fog after 3am. Patchy frost after 4am. Otherwise, mostly clear, with a low around 36.
Wednesday
Patchy fog. Patchy frost. Otherwise, mostly sunny, with a high near 52.
Wednesday Night
A slight chance of showers. Areas of fog. Otherwise, mostly cloudy, with a low around 40.
New Year's Day
A chance of showers. Areas of fog. Otherwise, cloudy, with a high near 50.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Napa CA
 38.29°N 122.29°W (Elev. 20 ft)
Last Update:
3:07 am PST Dec 26, 2025
Forecast Valid:
4am PST Dec 26, 2025-6pm PST Jan 1, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation