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

52°F

11°C

Humidity 76%
Wind Speed SSE 5 MPH
Barometer 29.87 in (1011.51 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 19 Oct 08:35 PM PDT
Extended Forecast for

Guerneville CA

  • Tonight

    Tonight: Areas of fog after 3am. Otherwise, mostly cloudy, with a low around 46. West southwest wind around 5 mph becoming calm in the evening.

    Low: 46 °F

    Cloudy then
    Areas Fog

  • Tuesday

    Tuesday: Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 67. Calm wind becoming south around 5 mph in the afternoon.

    High: 67 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after 4am. Mostly cloudy, with a low around 50. Light and variable wind.

    Low: 50 °F

    Cloudy then
    Slight Chance
    Showers

  • Wednesday

    Wednesday: A 40 percent chance of showers. Mostly cloudy, with a high near 69. Light and variable wind. New precipitation amounts of less than a tenth of an inch possible.

    High: 69 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers, mainly after 11pm. Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 50. West southwest wind around 6 mph becoming calm in the evening. New precipitation amounts of less than a tenth of an inch possible.

    Low: 50 °F

    Chance
    Showers and
    Patchy Fog

  • Thursday

    Thursday: A 20 percent chance of showers before 11am. Patchy fog before 11am. Otherwise, partly sunny, with a high near 68.

    High: 68 °F

    Slight Chance
    Showers and
    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 69.

    High: 69 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 47.

    Low: 47 °F

    Clear

Detailed Forecast

Tonight
Areas of fog after 3am. Otherwise, mostly cloudy, with a low around 46. West southwest wind around 5 mph becoming calm in the evening.
Tuesday
Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 67. Calm wind becoming south around 5 mph in the afternoon.
Tuesday Night
A 20 percent chance of showers after 4am. Mostly cloudy, with a low around 50. Light and variable wind.
Wednesday
A 40 percent chance of showers. Mostly cloudy, with a high near 69. Light and variable wind. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A 30 percent chance of showers, mainly after 11pm. Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 50. West southwest wind around 6 mph becoming calm in the evening. New precipitation amounts of less than a tenth of an inch possible.
Thursday
A 20 percent chance of showers before 11am. Patchy fog before 11am. Otherwise, partly sunny, with a high near 68.
Thursday Night
Mostly clear, with a low around 47.
Friday
Sunny, with a high near 69.
Friday Night
Clear, with a low around 47.
Saturday
Sunny, with a high near 70.
Saturday Night
A slight chance of showers. Partly cloudy, with a low around 49.
Sunday
A slight chance of showers. Mostly sunny, with a high near 71.
Sunday Night
Partly cloudy, with a low around 49.
Monday
A slight chance of showers. Mostly sunny, with a high near 70.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Guerneville CA
 38.49°N 123°W (Elev. 197 ft)
Last Update:
1:47 pm PDT Oct 19, 2026
Forecast Valid:
8pm PDT Oct 19, 2026-6pm PDT Oct 26, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation