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

KF6YUA Sebastopol (AR323)

Lat: 38.3803°NLon: 122.8242°WElev: 230.0ft.

NA

54°F

12°C

Humidity 91%
Wind Speed SSE 3 MPH
Barometer 29.71 in (1006.1 mb)
Dewpoint 51°F (11°C)
Visibility NA
Last update 25 Dec 05:53 AM PST
Extended Forecast for

Graton CA

Flood Watch December 25, 06:01am until December 26, 10:00pm
Wind Advisory December 25, 06:01am until December 25, 10:00am
Click here for hazard details and duration
Flood Watch
...
  •  
    Flood Watch December 25, 06:01am until December 26, 10:00pm
    Wind Advisory December 25, 06:01am until December 25, 10:00am

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Christmas Day

    High: 53 °F

    Severe
    Thunderstorms

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 1am, then rain after 1am. Some of the storms could be severe. Low around 46. South wind 9 to 17 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 46 °F

    Severe
    Thunderstorms

  • Friday

    Friday: Rain, mainly before 4pm. High near 53. South southwest wind 7 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 53 °F

    Rain

  • Friday Night

    Friday Night: A 40 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 41. North northwest wind 3 to 6 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 41 °F

    Chance Rain

  • Saturday

    Saturday: A 20 percent chance of rain before 10am. Mostly sunny, with a high near 53. North wind 3 to 5 mph.

    High: 53 °F

    Slight Chance
    Rain then
    Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 10pm. Patchy frost after 3am. Otherwise, partly cloudy, with a low around 37.

    Low: 37 °F

    Patchy Fog
    then Patchy
    Frost and
    Patchy Fog

  • Sunday

    Sunday: Patchy frost before 7am. Otherwise, partly sunny, with a high near 54.

    High: 54 °F

    Patchy Frost
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Patchy fog after 4am. Patchy frost after 2am. Otherwise, mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear
    then Patchy
    Frost and
    Patchy Fog

Detailed Forecast

Christmas Day
Showers and possibly a thunderstorm before 7am, then rain between 7am and 10am, then showers and possibly a thunderstorm after 10am. Some of the storms could be severe. High near 53. South wind 13 to 21 mph, with gusts as high as 38 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Showers and possibly a thunderstorm before 1am, then rain after 1am. Some of the storms could be severe. Low around 46. South wind 9 to 17 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Friday
Rain, mainly before 4pm. High near 53. South southwest wind 7 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
A 40 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 41. North northwest wind 3 to 6 mph. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A 20 percent chance of rain before 10am. Mostly sunny, with a high near 53. North wind 3 to 5 mph.
Saturday Night
Patchy fog after 10pm. Patchy frost after 3am. Otherwise, partly cloudy, with a low around 37.
Sunday
Patchy frost before 7am. Otherwise, partly sunny, with a high near 54.
Sunday Night
Patchy fog after 4am. Patchy frost after 2am. Otherwise, mostly clear, with a low around 35.
Monday
Patchy fog before 8am. Areas of frost before 8am. Otherwise, sunny, with a high near 56.
Monday Night
Patchy fog before midnight, then patchy fog after 2am. Patchy frost after 4am. Otherwise, mostly clear, with a low around 36.
Tuesday
Patchy fog. Patchy frost. Otherwise, sunny, with a high near 58.
Tuesday Night
Patchy fog. Otherwise, mostly clear, with a low around 38.
Wednesday
Patchy fog. Otherwise, partly sunny, with a high near 58.
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ABOUT THIS FORECAST

 
Point Forecast:
Graton CA
 38.43°N 122.84°W (Elev. 79 ft)
Last Update:
12:27 am PST Dec 25, 2025
Forecast Valid:
6am PST Dec 25, 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