Tracking Late December Winter Storm Expected to Impact the Northern Plains through the Northeast U.S.

A winter storm system will rapidly intensify over the Midwest on Sunday and track through the Great Lakes on Monday. Periods of heavy snow are anticipated across the Upper Great Lakes late Sunday and continuing into Monday. At least 1/10 inch of ice accumulation is expected from a wintry mix across much of the interior Northeast U.S. starting Sunday afternoon. Read More >

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Fog

36°F

2°C

Humidity 100%
Wind Speed N 0 MPH
Barometer 30.29 in (1025.74 mb)
Dewpoint 36°F (2°C)
Visibility 0.50 mi
Last update 28 Dec 02:38 AM PST
Extended Forecast for

Guerneville CA

  • Overnight

    Overnight: Mostly cloudy, with a low around 39. Calm wind.

    Low: 39 °F

    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 56. Calm wind.

    High: 56 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39. Calm wind.

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 58. Calm wind.

    High: 58 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 40. Calm wind.

    Low: 40 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog before 9pm.  Otherwise, mostly clear, with a low around 40.

    Low: 40 °F

    Patchy Fog
    then Partly
    Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 58.

    High: 58 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A chance of rain.  Patchy fog.  Otherwise, mostly cloudy, with a low around 44.

    Low: 44 °F

    Chance Rain
    and Patchy
    Fog

Detailed Forecast

Overnight
Mostly cloudy, with a low around 39. Calm wind.
Sunday
Sunny, with a high near 56. Calm wind.
Sunday Night
Mostly clear, with a low around 39. Calm wind.
Monday
Sunny, with a high near 58. Calm wind.
Monday Night
Mostly clear, with a low around 40. Calm wind.
Tuesday
Sunny, with a high near 59.
Tuesday Night
Patchy fog before 9pm. Otherwise, mostly clear, with a low around 40.
Wednesday
Mostly cloudy, with a high near 58.
Wednesday Night
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 44.
New Year's Day
Rain likely, mainly after 10am. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 56.
Thursday Night
Rain likely. Patchy fog. Otherwise, cloudy, with a low around 46.
Friday
A chance of rain. Mostly cloudy, with a high near 55.
Friday Night
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 43.
Saturday
A chance of rain. Areas of fog. Otherwise, mostly cloudy, with a high near 55.
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ABOUT THIS FORECAST

 
Point Forecast:
Guerneville CA
 38.49°N 123°W (Elev. 197 ft)
12:27 am PST Dec 28, 2025
2am PST Dec 28, 2025-6pm PST Jan 3, 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