National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Heavy Rain and Mountain Snow Lingers in California; Winter Storm Impacting the Great Lakes and Northeast U.S.

An atmospheric river will wind down through today across California with lingering heavy rainfall, heavy mountain snow, and gusty winds. A wintry mix of freezing rain, sleet, and snow will cause hazardous travel conditions for the Great Lakes into the northern Mid-Atlantic and southern New England today through Saturday morning. Areas of tree damage and power outages are possible. Read More >

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Fog

41°F

5°C

Humidity 100%
Wind Speed N 0 MPH
Barometer 30.05 in (1017.61 mb)
Dewpoint 41°F (5°C)
Visibility 0.25 mi
Last update 27 Dec 12:22 AM PST
Extended Forecast for

Guerneville CA

  • Overnight

    Overnight: A 20 percent chance of rain. Partly cloudy, with a low around 42. Light west northwest wind.

    Low: 42 °F

    Slight Chance
    Rain

  • Saturday

    Saturday: Sunny, with a high near 53. North wind 3 to 5 mph.

    High: 53 °F

    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 39. Calm wind.

    Low: 39 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 54. Calm wind.

    High: 54 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 38. Calm wind.

    Low: 38 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

Detailed Forecast

Overnight
A 20 percent chance of rain. Partly cloudy, with a low around 42. Light west northwest wind.
Saturday
Sunny, with a high near 53. North wind 3 to 5 mph.
Saturday Night
Increasing clouds, with a low around 39. Calm wind.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 54. Calm wind.
Sunday Night
Partly cloudy, with a low around 38. Calm wind.
Monday
Sunny, with a high near 57.
Monday Night
Mostly clear, with a low around 39.
Tuesday
Sunny, with a high near 59.
Tuesday Night
Mostly clear, with a low around 40.
Wednesday
Mostly sunny, with a high near 58.
Wednesday Night
A slight chance of rain. Mostly cloudy, with a low around 42.
New Year's Day
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a high near 54.
Thursday Night
Rain likely. Patchy fog. Otherwise, mostly cloudy, with a low around 45.
Friday
A chance of rain. Partly sunny, with a high near 53.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Guerneville CA
 38.52°N 122.98°W (Elev. 95 ft)
Last Update:
12:27 am PST Dec 27, 2025
Forecast Valid:
12am PST Dec 27, 2025-6pm PST Jan 2, 2026
 
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Additional Resources

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Chance of Precipitation