Strong Atmospheric River Bringing Heavy Rain to the Pacific Northwest; Areas of Snow in the North-Central and Eastern U.S.

A strong atmospheric river will bring prolonged heavy rainfall along with gusty winds to the Pacific Northwest through much of this week. The heavy rainfall may lead to widespread urban and river flooding. Accumulating snow is expected over parts of the central Appalachians and Mid-Atlantic today as well as the Upper Midwest and the Upper Great Lakes this evening into Tuesday. Read More >

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Mist

42°F

6°C

Humidity 95%
Wind Speed ESE 3 MPH
Barometer 30.36 in (1028.11 mb)
Dewpoint 41°F (5°C)
Visibility 2.00 mi
Last update 08 Dec 09:53 AM PST
Extended Forecast for

Guerneville CA

  • Today

    Today: Areas of fog before noon.  Otherwise, sunny, with a high near 61. Calm wind.

    High: 61 °F

    Areas Fog
    then Sunny

  • Tonight

    Tonight: Areas of dense fog.  Otherwise, partly cloudy, with a low around 44. Calm wind.

    Low: 44 °F

    Areas Dense
    Fog

  • Tuesday

    Tuesday: Areas of fog before noon.  Otherwise, sunny, with a high near 64. Calm wind.

    High: 64 °F

    Areas Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog before 4am, then patchy fog after 5am.  Otherwise, mostly clear, with a low around 47. Calm wind.

    Low: 47 °F

    Patchy Fog

  • Wednesday

    Wednesday: Patchy dense fog before 11am.  Otherwise, sunny, with a high near 68. Calm wind.

    High: 68 °F

    Patchy Dense
    Fog then
    Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog before 11pm.  Otherwise, mostly clear, with a low around 48.

    Low: 48 °F

    Patchy Fog
    then Mostly
    Clear

  • 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

  • Friday

    Friday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

Detailed Forecast

Today
Areas of fog before noon. Otherwise, sunny, with a high near 61. Calm wind.
Tonight
Areas of dense fog. Otherwise, partly cloudy, with a low around 44. Calm wind.
Tuesday
Areas of fog before noon. Otherwise, sunny, with a high near 64. Calm wind.
Tuesday Night
Patchy fog before 4am, then patchy fog after 5am. Otherwise, mostly clear, with a low around 47. Calm wind.
Wednesday
Patchy dense fog before 11am. Otherwise, sunny, with a high near 68. Calm wind.
Wednesday Night
Patchy fog before 11pm. 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 46.
Saturday
Sunny, with a high near 66.
Saturday Night
Patchy fog. Otherwise, partly cloudy, with a low around 47.
Sunday
Patchy fog. Otherwise, partly sunny, with a high near 63.
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ABOUT THIS FORECAST

 
Point Forecast:
Guerneville CA
 38.52°N 122.98°W (Elev. 95 ft)
6:22 am PST Dec 8, 2025
10am PST Dec 8, 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