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.

Fog

43°F

6°C

Humidity 100%
Wind Speed N 0 MPH
Barometer 30.33 in (1027.09 mb)
Dewpoint 43°F (6°C)
Visibility 0.25 mi
Last update 07 Dec 10:35 PM PST
Extended Forecast for

3 Miles WSW Santa Rosa CA

  • Tonight

    Tonight: Widespread dense fog. Otherwise, increasing clouds, with a low around 41. Calm wind.

    Low: 41 °F

    Dense Fog

  • Monday

    Monday: Widespread dense fog, mainly between 7am and noon. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 52. Calm wind.

    High: 52 °F

    Dense Fog
    then Sunny

  • Monday Night

    Monday Night: Widespread fog, mainly after 10pm. Otherwise, increasing clouds, with a low around 42. Calm wind.

    Low: 42 °F

    Fog

  • Tuesday

    Tuesday: Widespread fog before noon. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 64. Calm wind.

    High: 64 °F

    Fog then
    Sunny

  • Tuesday Night

    Tuesday Night: Widespread fog, mainly after 9pm. Otherwise, partly cloudy, with a low around 44. Calm wind.

    Low: 44 °F

    Fog

  • Wednesday

    Wednesday: Widespread fog, mainly before 11am. Otherwise, mostly sunny, with a high near 68.

    High: 68 °F

    Fog then
    Sunny

  • Wednesday Night

    Wednesday Night: Widespread fog, mainly after 8pm. Otherwise, partly cloudy, with a low around 45.

    Low: 45 °F

    Fog

  • Thursday

    Thursday: Widespread fog, mainly before 11am. Otherwise, mostly sunny, with a high near 68.

    High: 68 °F

    Fog then
    Sunny

  • Thursday Night

    Thursday Night: Widespread fog, mainly between 10pm and midnight. Otherwise, partly cloudy, with a low around 45.

    Low: 45 °F

    Fog

Detailed Forecast

Tonight
Widespread dense fog. Otherwise, increasing clouds, with a low around 41. Calm wind.
Monday
Widespread dense fog, mainly between 7am and noon. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 52. Calm wind.
Monday Night
Widespread fog, mainly after 10pm. Otherwise, increasing clouds, with a low around 42. Calm wind.
Tuesday
Widespread fog before noon. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 64. Calm wind.
Tuesday Night
Widespread fog, mainly after 9pm. Otherwise, partly cloudy, with a low around 44. Calm wind.
Wednesday
Widespread fog, mainly before 11am. Otherwise, mostly sunny, with a high near 68.
Wednesday Night
Widespread fog, mainly after 8pm. Otherwise, partly cloudy, with a low around 45.
Thursday
Widespread fog, mainly before 11am. Otherwise, mostly sunny, with a high near 68.
Thursday Night
Widespread fog, mainly between 10pm and midnight. Otherwise, partly cloudy, with a low around 45.
Friday
Widespread fog, mainly before 7am. Otherwise, mostly sunny, with a high near 68.
Friday Night
Areas of fog. Otherwise, partly cloudy, with a low around 44.
Saturday
Areas of fog. Otherwise, mostly sunny, with a high near 66.
Saturday Night
Widespread fog. Otherwise, partly cloudy, with a low around 44.
Sunday
Widespread fog. Otherwise, partly sunny, with a high near 64.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Santa Rosa CA
 38.44°N 122.76°W (Elev. 105 ft)
Last Update:
8:31 pm PST Dec 7, 2025
Forecast Valid:
10pm PST Dec 7, 2025-6pm PST Dec 14, 2025
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

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Chance of Precipitation