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

Hawaii and Guam Concerns; Severe Weather for the Plains; Heavy Snow for Sierra-Nevada

Heavy rainfall capable of causing flash flooding will continue to impact Hawaii through Monday. Severe thunderstorms and heavy rain are possible in parts of Texas and the southern Plains and the Upper Great Lakes. Heavy mountain snow continues in California's Sierra Nevada and rain with gusty winds to lower elevations. Super Typhoon Sinlaku will impact the Marianas through midweek. Read More >

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Mostly Cloudy

55°F

13°C

Humidity 66%
Wind Speed NA NA MPH
Barometer 29.94 in (1013.89 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 12 Apr 06:53 PM PDT
Extended Forecast for

Guerneville CA

  • Overnight

    Overnight: Patchy fog. Otherwise, partly cloudy, with a low around 42. Calm wind.

    Low: 42 °F

    Patchy Fog

  • Monday

    Monday: Patchy fog before 8am. Otherwise, sunny, with a high near 66. Calm wind becoming west southwest around 6 mph in the afternoon.

    High: 66 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 44. Northwest wind around 6 mph becoming calm in the evening.

    Low: 44 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 68. Calm wind becoming west around 6 mph in the afternoon.

    High: 68 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 47. Northwest wind 3 to 7 mph.

    Low: 47 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of rain after 11am. Partly sunny, with a high near 68.

    High: 68 °F

    Slight Chance
    Rain

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain before 11pm. Partly cloudy, with a low around 43.

    Low: 43 °F

    Slight Chance
    Rain then
    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 70.

    High: 70 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 46.

    Low: 46 °F

    Clear

Detailed Forecast

Overnight
Patchy fog. Otherwise, partly cloudy, with a low around 42. Calm wind.
Monday
Patchy fog before 8am. Otherwise, sunny, with a high near 66. Calm wind becoming west southwest around 6 mph in the afternoon.
Monday Night
Mostly clear, with a low around 44. Northwest wind around 6 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 68. Calm wind becoming west around 6 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 47. Northwest wind 3 to 7 mph.
Wednesday
A 20 percent chance of rain after 11am. Partly sunny, with a high near 68.
Wednesday Night
A 20 percent chance of rain before 11pm. Partly cloudy, with a low around 43.
Thursday
Sunny, with a high near 70.
Thursday Night
Clear, with a low around 46.
Friday
Sunny, with a high near 72.
Friday Night
Partly cloudy, with a low around 47.
Saturday
Mostly sunny, with a high near 72.
Saturday Night
Mostly cloudy, with a low around 49.
Sunday
A chance of rain. Partly sunny, with a high near 69.
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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:
1:26 am PDT Apr 13, 2026
Forecast Valid:
3am PDT Apr 13, 2026-6pm PDT Apr 19, 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