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

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Clear

46°F

8°C

Humidity 92%
Wind Speed N 0 MPH
Barometer 29.97 in (1014.9 mb)
Dewpoint 44°F (7°C)
Visibility 9.00 mi
Last update 18 Oct 03:53 AM PDT
Extended Forecast for

Guerneville CA

  • Today

    Today: Sunny, with a high near 75. Calm wind becoming southwest 5 to 9 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 75 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 48. West wind 5 to 7 mph becoming calm after midnight.

    Low: 48 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 65. Light west wind increasing to 5 to 9 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 65 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 30 percent chance of showers, mainly after 11pm. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 46. West wind 5 to 8 mph becoming calm in the evening. Winds could gust as high as 18 mph.

    Low: 46 °F

    Chance
    Showers and
    Patchy Fog

  • Tuesday

    Tuesday: A 30 percent chance of showers before 11am. Areas of fog before 9am. Otherwise, partly sunny, with a high near 67. Light and variable wind. New precipitation amounts of less than a tenth of an inch possible.

    High: 67 °F

    Chance
    Showers and
    Areas Fog
    then Partly
    Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after 11pm. Mostly cloudy, with a low around 49.

    Low: 49 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: A 40 percent chance of showers. Partly sunny, with a high near 70.

    High: 70 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of rain. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 50.

    Low: 50 °F

    Chance Rain
    and Patchy
    Fog

  • Thursday

    Thursday: A slight chance of rain after 11am. Areas of fog before 10am. Otherwise, mostly sunny, with a high near 67.

    High: 67 °F

    Slight Chance
    Rain and
    Areas Fog

Detailed Forecast

Today
Sunny, with a high near 75. Calm wind becoming southwest 5 to 9 mph in the afternoon. Winds could gust as high as 18 mph.
Tonight
Partly cloudy, with a low around 48. West wind 5 to 7 mph becoming calm after midnight.
Monday
Partly sunny, with a high near 65. Light west wind increasing to 5 to 9 mph in the afternoon. Winds could gust as high as 20 mph.
Monday Night
A 30 percent chance of showers, mainly after 11pm. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 46. West wind 5 to 8 mph becoming calm in the evening. Winds could gust as high as 18 mph.
Tuesday
A 30 percent chance of showers before 11am. Areas of fog before 9am. Otherwise, partly sunny, with a high near 67. Light and variable wind. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
A 20 percent chance of showers after 11pm. Mostly cloudy, with a low around 49.
Wednesday
A 40 percent chance of showers. Partly sunny, with a high near 70.
Wednesday Night
A chance of rain. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 50.
Thursday
A slight chance of rain after 11am. Areas of fog before 10am. Otherwise, mostly sunny, with a high near 67.
Thursday Night
Mostly clear, with a low around 48.
Friday
Patchy fog. Otherwise, sunny, with a high near 69.
Friday Night
Mostly clear, with a low around 46.
Saturday
Mostly sunny, with a high near 69.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Guerneville CA
 38.49°N 123°W (Elev. 197 ft)
Last Update:
2:41 am PDT Oct 18, 2026
Forecast Valid:
4am PDT Oct 18, 2026-6pm PDT Oct 24, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation