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.

Clear

55°F

13°C

Humidity 82%
Wind Speed SSW 3 MPH
Barometer 29.67 in (1004.74 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 24 Dec 10:20 AM PST
Extended Forecast for

Napa Co. Airport CA

Flood Watch December 24, 10:41am until December 26, 10:00pm
Wind Advisory December 24, 08:00pm until December 25, 10:00am
Click here for hazard details and duration
Flood Watch
Wind Advisory
  •  
    Flood Watch December 24, 10:41am until December 26, 10:00pm

    NOW until 10:00pm Fri

    Flood Watch

  • Today

    High: 57 °F

    Slight Chance
    Showers then
    Severe
    Thunderstorms

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms between 10pm and 1am, then showers and possibly a thunderstorm after 1am. Some of the storms could be severe. Low around 50. South southeast wind 13 to 21 mph, with gusts as high as 38 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 50 °F

    Severe
    Thunderstorms

  • Christmas Day

    Christmas Day: Showers likely and possibly a thunderstorm before 9am, then showers between 9am and 1pm, then showers and possibly a thunderstorm after 1pm. Some of the storms could be severe. High near 53. Breezy, with a south wind 14 to 19 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 37 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 53 °F

    Severe
    Thunderstorms
    and Breezy

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Some of the storms could be severe. Low around 47. Breezy, with a south wind 17 to 22 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 47 °F

    Severe
    Thunderstorms
    and Breezy

  • Friday

    Friday: Showers, with thunderstorms also possible after 1pm. High near 52. South wind 14 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 52 °F

    Showers

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms, mainly between 10pm and 4am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 41. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 41 °F

    Showers
    Likely and
    Patchy Fog

  • Saturday

    Saturday: A 20 percent chance of showers before 10am. Patchy fog before 10am. Otherwise, partly sunny, with a high near 52.

    High: 52 °F

    Slight Chance
    Showers and
    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear

Detailed Forecast

Today
Showers and thunderstorms, mainly before 4pm, then showers and possibly a thunderstorm after 5pm. Some of the storms could be severe. High near 57. Southeast wind 8 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms between 10pm and 1am, then showers and possibly a thunderstorm after 1am. Some of the storms could be severe. Low around 50. South southeast wind 13 to 21 mph, with gusts as high as 38 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Christmas Day
Showers likely and possibly a thunderstorm before 9am, then showers between 9am and 1pm, then showers and possibly a thunderstorm after 1pm. Some of the storms could be severe. High near 53. Breezy, with a south wind 14 to 19 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 37 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
Showers and possibly a thunderstorm. Some of the storms could be severe. Low around 47. Breezy, with a south wind 17 to 22 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Friday
Showers, with thunderstorms also possible after 1pm. High near 52. South wind 14 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers likely and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms, mainly between 10pm and 4am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 41. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
A 20 percent chance of showers before 10am. Patchy fog before 10am. Otherwise, partly sunny, with a high near 52.
Saturday Night
Mostly clear, with a low around 36.
Sunday
Mostly sunny, with a high near 52.
Sunday Night
Patchy fog after 1am. Otherwise, mostly clear, with a low around 36.
Monday
Sunny, with a high near 53.
Monday Night
Patchy fog. Otherwise, mostly clear, with a low around 37.
Tuesday
Patchy fog. Otherwise, mostly sunny, with a high near 54.
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ABOUT THIS FORECAST

 
Point Forecast:
Napa Co. Airport CA
 38.2°N 122.29°W (Elev. 20 ft)
Last Update:
8:40 am PST Dec 24, 2025
Forecast Valid:
10am PST Dec 24, 2025-6pm PST Dec 30, 2025
 
Forecast Discussion
 
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