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

Air Quality Concerns; Fire Weather; Extreme Heat; Flash Flooding

Wildfire smoke continues to result in poor air quality from the Upper Midwest into the Northeast. Dangerous heat and fire weather concerns for portions of the Four Corners region into the central Great Basin. Heavy rainfall and flash flooding possible for the Southeast through Monday. For Hawaii, gusty trade winds a drier weather could result in any fires that start to spread rapidly. Read More >

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Clear

54°F

12°C

Humidity 81%
Wind Speed S 3 MPH
Barometer 29.98 in (1015.24 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 04 Aug 02:20 AM PDT
Extended Forecast for

Guerneville CA

  • Overnight

    Overnight: Clear, with a steady temperature around 56. West wind 3 to 5 mph.

    Low: 56 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 84. Light west wind becoming west northwest 6 to 11 mph in the morning. Winds could gust as high as 22 mph.

    High: 84 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 52. West northwest wind 5 to 10 mph becoming light northwest after midnight. Winds could gust as high as 22 mph.

    Low: 52 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 82. Calm wind becoming west 5 to 7 mph in the afternoon.

    High: 82 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 56. West wind 5 to 8 mph becoming calm in the evening.

    Low: 56 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a steady temperature around 56. West wind 3 to 5 mph.
Monday
Sunny, with a high near 84. Light west wind becoming west northwest 6 to 11 mph in the morning. Winds could gust as high as 22 mph.
Monday Night
Clear, with a low around 52. West northwest wind 5 to 10 mph becoming light northwest after midnight. Winds could gust as high as 22 mph.
Tuesday
Sunny, with a high near 82. Calm wind becoming west 5 to 7 mph in the afternoon.
Tuesday Night
Clear, with a low around 56. West wind 5 to 8 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 86.
Wednesday Night
Mostly clear, with a low around 57.
Thursday
Sunny, with a high near 83.
Thursday Night
Mostly clear, with a low around 55.
Friday
Sunny, with a high near 81.
Friday Night
Mostly clear, with a low around 54.
Saturday
Sunny, with a high near 79.
Saturday Night
Mostly clear, with a low around 53.
Sunday
Sunny, with a high near 76.
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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:
1:26 am PDT Aug 4, 2025
Forecast Valid:
2am PDT Aug 4, 2025-6pm PDT Aug 10, 2025
 
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