Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

Lat: 38.5°NLon: 122.81667°WElev: 125.0ft.

Mist

43°F

6°C

Humidity 100%
Wind Speed N 0 MPH
Barometer 30.31 in (1026.41 mb)
Dewpoint 43°F (6°C)
Visibility 1.75 mi
Last update 07 Dec 08:23 PM PST
Extended Forecast for

Guerneville CA

  • Tonight

    Tonight: Widespread dense fog, mainly between 11pm and midnight.  Otherwise, mostly clear, with a low around 44. Calm wind.

    Low: 44 °F

    Dense Fog

  • Monday

    Monday: Widespread dense fog, mainly before 10am.  Otherwise, sunny, with a high near 55. Calm wind.

    High: 55 °F

    Dense Fog
    then Sunny

  • Monday Night

    Monday Night: Areas of dense fog.  Otherwise, partly cloudy, with a low around 45. Calm wind.

    Low: 45 °F

    Areas Dense
    Fog

  • Tuesday

    Tuesday: Areas of dense fog before noon.  Otherwise, mostly sunny, with a high near 65. Light west northwest wind.

    High: 65 °F

    Areas Dense
    Fog then
    Sunny

  • Tuesday Night

    Tuesday Night: Patchy dense fog.  Otherwise, partly cloudy, with a low around 47. Calm wind.

    Low: 47 °F

    Patchy Dense
    Fog

  • Wednesday

    Wednesday: Patchy dense fog before noon.  Otherwise, sunny, with a high near 68.

    High: 68 °F

    Patchy Dense
    Fog then
    Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog before 2am.  Otherwise, mostly clear, with a low around 48.

    Low: 48 °F

    Patchy Fog

  • Thursday

    Thursday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 48.

    Low: 48 °F

    Mostly Clear

Detailed Forecast

Tonight
Widespread dense fog, mainly between 11pm and midnight. Otherwise, mostly clear, with a low around 44. Calm wind.
Monday
Widespread dense fog, mainly before 10am. Otherwise, sunny, with a high near 55. Calm wind.
Monday Night
Areas of dense fog. Otherwise, partly cloudy, with a low around 45. Calm wind.
Tuesday
Areas of dense fog before noon. Otherwise, mostly sunny, with a high near 65. Light west northwest wind.
Tuesday Night
Patchy dense fog. Otherwise, partly cloudy, with a low around 47. Calm wind.
Wednesday
Patchy dense fog before noon. Otherwise, sunny, with a high near 68.
Wednesday Night
Patchy fog before 2am. Otherwise, mostly clear, with a low around 48.
Thursday
Sunny, with a high near 68.
Thursday Night
Mostly clear, with a low around 48.
Friday
Sunny, with a high near 68.
Friday Night
Mostly clear, with a low around 47.
Saturday
Sunny, with a high near 67.
Saturday Night
Patchy fog. Otherwise, partly cloudy, with a low around 47.
Sunday
Patchy fog. Otherwise, mostly sunny, with a high near 64.
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ABOUT THIS FORECAST

 
Point Forecast:
Guerneville CA
 38.52°N 122.98°W (Elev. 95 ft)
8:31 pm PST Dec 7, 2025
8pm PST Dec 7, 2025-6pm PST Dec 14, 2025
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database