Heavy Great Lakes Snow through Friday; Extreme Cold and Potential for Major Winter Storm Late Week into this Weekend

Multiple clipper systems will bring cold temperatures and enhance lake-effect snow downwind of the Great Lakes. An arctic blast will bring frigid temperatures accompanied with gusty winds that may lead to dangerous wind chills beginning in the Northern Plains Thursday before expanding to the South and East. An expansive winter storm will start Friday in the Southern Rockies/Plains and Mid-South. 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 N 0 MPH
Barometer 30.08 in (1018.63 mb)
Dewpoint 43°F (6°C)
Visibility 2.50 mi
Last update 21 Jan 12:35 AM PST
Extended Forecast for

3 Miles ESE Guerneville CA

  • Overnight

    Overnight: Areas of fog before 4am.  Otherwise, cloudy, with a low around 47. Calm wind.

    Low: 47 °F

    Areas Fog

  • Wednesday

    Wednesday: Areas of fog between 8am and 9am.  Otherwise, cloudy, with a high near 60. Calm wind.

    High: 60 °F

    Areas Fog
    then Cloudy

  • Wednesday Night

    Wednesday Night: Widespread dense fog, mainly between 1am and 2am.  Otherwise, mostly cloudy, with a low around 47. Calm wind.

    Low: 47 °F

    Cloudy then
    Dense Fog

  • Thursday

    Thursday: Widespread dense fog, mainly between 7am and 11am.  Otherwise, partly sunny, with a high near 60. Calm wind.

    High: 60 °F

    Dense Fog
    then Partly
    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 46. Calm wind.

    Low: 46 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 41.

    Low: 41 °F

    Partly Cloudy

Detailed Forecast

Overnight
Areas of fog before 4am. Otherwise, cloudy, with a low around 47. Calm wind.
Wednesday
Areas of fog between 8am and 9am. Otherwise, cloudy, with a high near 60. Calm wind.
Wednesday Night
Widespread dense fog, mainly between 1am and 2am. Otherwise, mostly cloudy, with a low around 47. Calm wind.
Thursday
Widespread dense fog, mainly between 7am and 11am. Otherwise, partly sunny, with a high near 60. Calm wind.
Thursday Night
Partly cloudy, with a low around 46. Calm wind.
Friday
Mostly sunny, with a high near 60.
Friday Night
Partly cloudy, with a low around 43.
Saturday
Sunny, with a high near 61.
Saturday Night
Partly cloudy, with a low around 41.
Sunday
Mostly cloudy, with a high near 58.
Sunday Night
Mostly cloudy, with a low around 42.
Monday
Partly sunny, with a high near 60.
Monday Night
Partly cloudy, with a low around 42.
Tuesday
Mostly cloudy, with a high near 59.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ESE Guerneville CA
 38.5°N 122.95°W (Elev. 79 ft)
12:26 am PST Jan 21, 2026
12am PST Jan 21, 2026-6pm PST Jan 27, 2026
 
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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