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

Dangerous Cold and Gusty Winds Anticipated This Weekend

A significant arctic outbreak will bring frigid temperatures and dangerously cold wind chills to the Northeast and Mid-Atlantic this weekend. Strong winds which could produce tree damage and power outages, and periods of snow squalls are also possible. Relief from this cold and a warming trend is forecast to commence by the beginning to middle of next week. Read More >

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Clear

52°F

11°C

Humidity 89%
Wind Speed NNW 3 MPH
Barometer 30.03 in (1016.93 mb)
Dewpoint 49°F (9°C)
Visibility 9.00 mi
Last update 05 Feb 08:53 PM PST
Extended Forecast for

Guerneville CA

  • Tonight

    Tonight: Mostly cloudy, with a low around 49. Calm wind.

    Low: 49 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 66. Light and variable wind.

    High: 66 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Patchy fog after 10pm. Otherwise, partly cloudy, with a low around 46. Calm wind.

    Low: 46 °F

    Patchy Fog

  • Saturday

    Saturday: Patchy dense fog before 9am. Otherwise, mostly sunny, with a high near 64. Light and variable wind.

    High: 64 °F

    Patchy Dense
    Fog then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 4am. Otherwise, partly cloudy, with a low around 46. Calm wind.

    Low: 46 °F

    Partly Cloudy
    then Patchy
    Fog

  • Sunday

    Sunday: A 30 percent chance of rain, mainly after 4pm. Patchy dense fog before 10am. Otherwise, partly sunny, with a high near 63.

    High: 63 °F

    Chance Rain
    and Patchy
    Dense Fog

  • Sunday Night

    Sunday Night: A 40 percent chance of rain, mainly before 10pm. Patchy fog before 10pm, then patchy fog after 2am. Otherwise, mostly cloudy, with a low around 47.

    Low: 47 °F

    Chance Rain
    and Patchy
    Fog

  • Monday

    Monday: Areas of fog before 9am. Otherwise, mostly cloudy, with a high near 60.

    High: 60 °F

    Areas Fog
    then Mostly
    Cloudy

  • Monday Night

    Monday Night: A slight chance of rain. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Slight Chance
    Rain

Detailed Forecast

Tonight
Mostly cloudy, with a low around 49. Calm wind.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 66. Light and variable wind.
Friday Night
Patchy fog after 10pm. Otherwise, partly cloudy, with a low around 46. Calm wind.
Saturday
Patchy dense fog before 9am. Otherwise, mostly sunny, with a high near 64. Light and variable wind.
Saturday Night
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 46. Calm wind.
Sunday
A 30 percent chance of rain, mainly after 4pm. Patchy dense fog before 10am. Otherwise, partly sunny, with a high near 63.
Sunday Night
A 40 percent chance of rain, mainly before 10pm. Patchy fog before 10pm, then patchy fog after 2am. Otherwise, mostly cloudy, with a low around 47.
Monday
Areas of fog before 9am. Otherwise, mostly cloudy, with a high near 60.
Monday Night
A slight chance of rain. Mostly cloudy, with a low around 43.
Tuesday
A chance of rain. Partly sunny, with a high near 57.
Tuesday Night
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 42.
Wednesday
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a high near 56.
Wednesday Night
A slight chance of rain. Partly cloudy, with a low around 40.
Thursday
A slight chance of rain. Mostly sunny, with a high near 60.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Guerneville CA
 38.5°N 122.98°W (Elev. 397 ft)
Last Update:
12:26 pm PST Feb 5, 2026
Forecast Valid:
9pm PST Feb 5, 2026-6pm PST Feb 12, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation