National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

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 ENE 4 MPH
Barometer 30.33 in (1027.09 mb)
Dewpoint 43°F (6°C)
Visibility 2.50 mi
Wind Chill41°F (5°C)
Last update 08 Dec 03:00 AM PST
Extended Forecast for

2 Miles SSE Guerneville CA

  • Overnight

    Overnight: Areas of fog. Otherwise, mostly cloudy, with a low around 43. Calm wind.

    Low: 43 °F

    Areas Fog

  • Monday

    Monday: Widespread fog before noon, then patchy fog after 5pm. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 60. Calm wind.

    High: 60 °F

    Fog

  • Monday Night

    Monday Night: Areas of dense fog. Otherwise, increasing clouds, with a low around 44. Calm wind.

    Low: 44 °F

    Areas Dense
    Fog

  • Tuesday

    Tuesday: Areas of fog before noon. Otherwise, mostly sunny, with a high near 63. Calm wind.

    High: 63 °F

    Areas Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog between 1am and 4am. Otherwise, mostly clear, with a low around 47. Light north wind.

    Low: 47 °F

    Mostly Clear
    then Patchy
    Fog

  • Wednesday

    Wednesday: Patchy dense fog before 10am. Otherwise, sunny, with a high near 65.

    High: 65 °F

    Patchy Dense
    Fog then
    Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog before midnight, then patchy fog after 4am. Otherwise, mostly clear, with a low around 48.

    Low: 48 °F

    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 9am. Otherwise, sunny, with a high near 66.

    High: 66 °F

    Patchy Fog
    then Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

Detailed Forecast

Overnight
Areas of fog. Otherwise, mostly cloudy, with a low around 43. Calm wind.
Monday
Widespread fog before noon, then patchy fog after 5pm. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 60. Calm wind.
Monday Night
Areas of dense fog. Otherwise, increasing clouds, with a low around 44. Calm wind.
Tuesday
Areas of fog before noon. Otherwise, mostly sunny, with a high near 63. Calm wind.
Tuesday Night
Patchy fog between 1am and 4am. Otherwise, mostly clear, with a low around 47. Light north wind.
Wednesday
Patchy dense fog before 10am. Otherwise, sunny, with a high near 65.
Wednesday Night
Patchy fog before midnight, then patchy fog after 4am. Otherwise, mostly clear, with a low around 48.
Thursday
Patchy fog before 9am. Otherwise, sunny, with a high near 66.
Thursday Night
Mostly clear, with a low around 47.
Friday
Sunny, with a high near 66.
Friday Night
Mostly clear, with a low around 46.
Saturday
Sunny, with a high near 64.
Saturday Night
Patchy fog. Otherwise, partly cloudy, with a low around 46.
Sunday
Patchy fog. Otherwise, partly sunny, with a high near 60.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE Guerneville CA
 38.48°N 122.97°W (Elev. 597 ft)
Last Update:
2:09 am PST Dec 8, 2025
Forecast Valid:
3am PST Dec 8, 2025-6pm PST Dec 14, 2025
 
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Additional Resources

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National Digital Forecast Database

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Chance of Precipitation