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,fog

40°F

4°C

Humidity 100%
Wind Speed NNW 3 MPH
Barometer 30.3 in (1026.08 mb)
Dewpoint 40°F (4°C)
Visibility 0.50 mi
Last update 07 Dec 07:11 PM PST
Extended Forecast for

Santa Rosa CA

  • Tonight

    Tonight: Widespread dense fog, mainly after 8pm. Otherwise, partly cloudy, with a low around 41. Calm wind.

    Low: 41 °F

    Dense Fog

  • Monday

    Monday: Widespread dense fog, mainly before noon. Otherwise, mostly sunny, with a high near 52. Calm wind.

    High: 52 °F

    Dense Fog

  • Monday Night

    Monday Night: Widespread fog, mainly after 9pm. Otherwise, partly cloudy, with a low around 42. Calm wind.

    Low: 42 °F

    Fog

  • Tuesday

    Tuesday: Widespread fog, mainly before 10am. Otherwise, mostly 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 45. Calm wind.

    Low: 45 °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 between 9pm and 1am. Otherwise, partly cloudy, with a low around 46.

    Low: 46 °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: Areas of fog. Otherwise, partly cloudy, with a low around 45.

    Low: 45 °F

    Areas Fog

Detailed Forecast

Tonight
Widespread dense fog, mainly after 8pm. Otherwise, partly cloudy, with a low around 41. Calm wind.
Monday
Widespread dense fog, mainly before noon. Otherwise, mostly sunny, with a high near 52. Calm wind.
Monday Night
Widespread fog, mainly after 9pm. Otherwise, partly cloudy, with a low around 42. Calm wind.
Tuesday
Widespread fog, mainly before 10am. Otherwise, mostly sunny, with a high near 64. Calm wind.
Tuesday Night
Widespread fog, mainly after 9pm. Otherwise, partly cloudy, with a low around 45. Calm wind.
Wednesday
Widespread fog, mainly before 11am. Otherwise, mostly sunny, with a high near 68.
Wednesday Night
Widespread fog, mainly between 9pm and 1am. Otherwise, partly cloudy, with a low around 46.
Thursday
Widespread fog, mainly before 11am. Otherwise, mostly sunny, with a high near 68.
Thursday Night
Areas of fog. Otherwise, partly cloudy, with a low around 45.
Friday
Areas of fog before 11am. Otherwise, sunny, with a high near 67.
Friday Night
Patchy fog. Otherwise, mostly clear, 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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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Santa Rosa CA
 38.45°N 122.73°W (Elev. 131 ft)
Last Update:
6:20 pm PST Dec 7, 2025
Forecast Valid:
7pm PST Dec 7, 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