Prolonged Atmospheric River in the Northwest; Snow in the North-Central US

A prolonged atmospheric river will bring heavy rainfall which may lead to widespread urban and river flooding, heavy mountain snow, along with gusty winds to the Pacific Northwest into the northern Rockies through much of the week. A clipper will bring a period of snow across the upper Midwest and the Great Lakes into Tuesday, before a stronger system bring more wintry impacts. Read More >

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Mist

39°F

4°C

Humidity 95%
Wind Speed N 0 MPH
Barometer 30.32 in (1026.75 mb)
Dewpoint 38°F (3°C)
Visibility 2.00 mi
Last update 08 Dec 08:39 PM PST
Extended Forecast for

Santa Rosa CA

  • Tonight

    Tonight: Widespread dense fog.  Otherwise, mostly cloudy, with a low around 42. Calm wind.

    Low: 42 °F

    Dense Fog

  • Tuesday

    Tuesday: Widespread dense fog, mainly before 11am.  Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 61. Calm wind.

    High: 61 °F

    Dense Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Widespread fog, mainly after 4am.  Otherwise, partly cloudy, with a low around 44. Calm wind.

    Low: 44 °F

    Fog

  • Wednesday

    Wednesday: Widespread fog, mainly before 10am.  Otherwise, mostly sunny, with a high near 67. Calm wind.

    High: 67 °F

    Fog then
    Sunny

  • Wednesday Night

    Wednesday Night: Widespread fog, mainly after 3am.  Otherwise, mostly clear, with a low around 46. Calm wind.

    Low: 46 °F

    Fog

  • Thursday

    Thursday: Widespread fog, mainly before 10am.  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 44.

    Low: 44 °F

    Areas Fog

  • Friday

    Friday: Areas of fog before 11am.  Otherwise, mostly sunny, with a high near 68.

    High: 68 °F

    Areas Fog
    then Sunny

  • Friday Night

    Friday Night: Patchy fog.  Otherwise, mostly clear, with a low around 43.

    Low: 43 °F

    Patchy Fog

Detailed Forecast

Tonight
Widespread dense fog. Otherwise, mostly cloudy, with a low around 42. Calm wind.
Tuesday
Widespread dense fog, mainly before 11am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 61. Calm wind.
Tuesday Night
Widespread fog, mainly after 4am. Otherwise, partly cloudy, with a low around 44. Calm wind.
Wednesday
Widespread fog, mainly before 10am. Otherwise, mostly sunny, with a high near 67. Calm wind.
Wednesday Night
Widespread fog, mainly after 3am. Otherwise, mostly clear, with a low around 46. Calm wind.
Thursday
Widespread fog, mainly before 10am. Otherwise, mostly sunny, with a high near 68.
Thursday Night
Areas of fog. Otherwise, partly cloudy, with a low around 44.
Friday
Areas of fog before 11am. Otherwise, mostly sunny, with a high near 68.
Friday Night
Patchy fog. Otherwise, mostly clear, with a low around 43.
Saturday
Areas of fog before 11am. Otherwise, mostly sunny, with a high near 65.
Saturday Night
Widespread fog. Otherwise, partly cloudy, with a low around 44.
Sunday
Widespread fog. Otherwise, partly sunny, with a high near 62.
Sunday Night
A slight chance of rain. Widespread fog. Otherwise, mostly cloudy, with a low around 46.
Monday
A chance of rain. Areas of fog. Otherwise, mostly cloudy, with a high near 61.
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ABOUT THIS FORECAST

 
Point Forecast:
Santa Rosa CA
 38.45°N 122.73°W (Elev. 131 ft)
12:26 pm PST Dec 8, 2025
8pm PST Dec 8, 2025-6pm PST Dec 15, 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