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

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Hazardous Weather Conditions

Current conditions at

Napa, Napa County Airport (KAPC)

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

Mostly Cloudy

55°F

13°C

Humidity 87%
Wind Speed SSE 10 MPH
Barometer 29.62 in (1003.05 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 24 Dec 10:35 PM PST
Extended Forecast for

Yountville CA

Flood Watch December 24, 10:57pm until December 26, 10:00pm
Wind Advisory until December 25, 10:00am
Click here for hazard details and duration
Flood Watch
Wind Advisory
  •  
    Flood Watch December 24, 10:57pm until December 26, 10:00pm
    Wind Advisory until December 25, 10:00am

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Tonight

    Low: 48 °F

    Breezy.
    Showers then
    Severe
    Thunderstorms

  • Christmas Day

    Christmas Day: Showers and possibly a thunderstorm before 7am, then showers between 7am and 10am, then showers and possibly a thunderstorm after 10am. Some of the storms could be severe. High near 51. Breezy, with a south wind 13 to 22 mph, with gusts as high as 33 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 51 °F

    Severe
    Thunderstorms
    and Breezy

  • Thursday Night

    Thursday Night: Showers. Low around 46. South wind 9 to 18 mph, with gusts as high as 43 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 46 °F

    Showers

  • Friday

    Friday: Showers. High near 51. South wind 6 to 8 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 51 °F

    Showers

  • Friday Night

    Friday Night: A 50 percent chance of showers, mainly before 4am. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 39. Calm wind. New precipitation amounts of less than a tenth of an inch possible.

    Low: 39 °F

    Chance
    Showers and
    Patchy Fog

  • Saturday

    Saturday: A 20 percent chance of showers before 10am. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 51.

    High: 51 °F

    Slight Chance
    Showers and
    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

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

    Low: 36 °F

    Mostly Clear
    then Patchy
    Frost

  • Sunday

    Sunday: Areas of frost before 8am. Otherwise, mostly sunny, with a high near 52.

    High: 52 °F

    Areas Frost
    then Sunny

Detailed Forecast

Tonight
Showers and possibly a thunderstorm. Some of the storms could be severe. Low around 48. Breezy, with a southeast wind 21 to 25 mph, with gusts as high as 47 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Christmas Day
Showers and possibly a thunderstorm before 7am, then showers between 7am and 10am, then showers and possibly a thunderstorm after 10am. Some of the storms could be severe. High near 51. Breezy, with a south wind 13 to 22 mph, with gusts as high as 33 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
Showers. Low around 46. South wind 9 to 18 mph, with gusts as high as 43 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Friday
Showers. High near 51. South wind 6 to 8 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
A 50 percent chance of showers, mainly before 4am. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 39. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A 20 percent chance of showers before 10am. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 51.
Saturday Night
Patchy frost after 3am. Otherwise, mostly clear, with a low around 36.
Sunday
Areas of frost before 8am. Otherwise, mostly sunny, with a high near 52.
Sunday Night
Patchy frost after 1am. Otherwise, mostly clear, with a low around 35.
Monday
Areas of frost before 9am. Otherwise, sunny, with a high near 54.
Monday Night
Patchy fog. Patchy frost. Otherwise, mostly clear, with a low around 35.
Tuesday
Patchy frost. Otherwise, sunny, with a high near 55.
Tuesday Night
Partly cloudy, with a low around 37.
Wednesday
Patchy fog. Otherwise, mostly sunny, with a high near 54.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Yountville CA
 38.4°N 122.34°W (Elev. 184 ft)
Last Update:
4:56 pm PST Dec 24, 2025
Forecast Valid:
10pm PST Dec 24, 2025-6pm PST Dec 31, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation