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

Novato / Gnoss Field (KDVO)

Lat: 38.14178°NLon: 122.55463°WElev: 3.0ft.

Rain

57°F

14°C

Humidity 82%
Wind Speed S 20 MPH
Barometer 29.58 in (1001.69 mb)
Dewpoint 52°F (11°C)
Visibility 9.00 mi
Last update 24 Dec 07:55 PM PST
Extended Forecast for

Sonoma CA

Flood Watch December 24, 08:23pm 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, 08:23pm until December 26, 10:00pm
    Wind Advisory until December 25, 10:00am

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Tonight

    Low: 52 °F

    Showers and
    Breezy

  • Christmas Day

    Christmas Day: Showers and possibly a thunderstorm. Some of the storms could be severe. High near 51. Breezy, with a south wind 11 to 16 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 34 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 51 °F

    Severe
    Thunderstorms
    and Breezy

  • Thursday Night

    Thursday Night: Showers. Steady temperature around 49. Breezy, with a south southwest wind 20 to 25 mph decreasing to 9 to 14 mph. Winds could gust as high as 44 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 49 °F

    Showers and
    Breezy

  • Friday

    Friday: Showers. High near 51. South wind around 7 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 51 °F

    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 39. Light and variable wind. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    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: Areas of frost after 2am. Otherwise, mostly clear, with a low around 34.

    Low: 34 °F

    Mostly Clear
    then Areas
    Frost

  • Sunday

    Sunday: Areas of frost before 9am. Otherwise, mostly sunny, with a high near 52.

    High: 52 °F

    Areas Frost
    then Sunny

Detailed Forecast

Tonight
Showers and possibly a thunderstorm. Steady temperature around 52. Breezy, with a south southeast wind 14 to 19 mph increasing to 20 to 25 mph after midnight. Winds could gust as high as 50 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Christmas Day
Showers and possibly a thunderstorm. Some of the storms could be severe. High near 51. Breezy, with a south wind 11 to 16 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 34 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
Showers. Steady temperature around 49. Breezy, with a south southwest wind 20 to 25 mph decreasing to 9 to 14 mph. Winds could gust as high as 44 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 around 7 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
A chance of showers and thunderstorms. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 39. Light and variable wind. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
A 20 percent chance of showers before 10am. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 51.
Saturday Night
Areas of frost after 2am. Otherwise, mostly clear, with a low around 34.
Sunday
Areas of frost before 9am. Otherwise, mostly sunny, with a high near 52.
Sunday Night
Widespread frost, mainly after 5am. Otherwise, mostly clear, with a low around 34.
Monday
Widespread frost, mainly before 7am. Otherwise, sunny, with a high near 54.
Monday Night
Patchy fog. Patchy frost. Otherwise, mostly clear, with a low around 34.
Tuesday
Patchy fog. Areas of 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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ABOUT THIS FORECAST

 
Point Forecast:
Sonoma CA
 38.3°N 122.49°W (Elev. 108 ft)
Last Update:
4:56 pm PST Dec 24, 2025
Forecast Valid:
8pm PST Dec 24, 2025-6pm PST Dec 31, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation