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

Hot Temperatures in the Northwest U.S.; Tropical Rainfall Potential in the Southwest U.S.

Hot to extremely hot temperatures are in place again Thursday across the interior northwest U.S. A combination of monsoonal moisture and tropical moisture ahead of tropical cyclone Lorena will bring a marginal to slight risk of excessive rainfall across the southwest U.S. through Saturday which may bring areas of flooding. Read More >

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Clear

66°F

19°C

Humidity 68%
Wind Speed SSE 10 MPH
Barometer 29.92 in (1013.21 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 03 Sep 07:20 PM PDT
Extended Forecast for

Guerneville CA

  • Tonight

    Tonight: Patchy fog after 9pm. Otherwise, increasing clouds, with a low around 53. Southwest wind around 6 mph becoming calm in the evening.

    Low: 53 °F

    Patchy Fog

  • Thursday

    Thursday: Widespread fog, mainly before 8am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 77. Calm wind becoming southwest 5 to 9 mph in the afternoon.

    High: 77 °F

    Fog then
    Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 10pm. Otherwise, partly cloudy, with a low around 54. West southwest wind 3 to 6 mph.

    Low: 54 °F

    Patchy Fog

  • Friday

    Friday: Areas of fog before 9am. Otherwise, sunny, with a high near 80. Calm wind becoming west southwest 5 to 9 mph in the afternoon.

    High: 80 °F

    Areas Fog
    then Sunny

  • Friday Night

    Friday Night: Patchy fog after 3am. Otherwise, mostly clear, with a low around 54. West southwest wind 5 to 9 mph.

    Low: 54 °F

    Mostly Clear
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 9am. Otherwise, sunny, with a high near 79.

    High: 79 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 5am. Otherwise, mostly clear, with a low around 55.

    Low: 55 °F

    Clear then
    Patchy Fog

  • Sunday

    Sunday: Patchy fog before 9am. Otherwise, sunny, with a high near 79.

    High: 79 °F

    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Patchy fog after 1am. Otherwise, mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear
    then Patchy
    Fog

Detailed Forecast

Tonight
Patchy fog after 9pm. Otherwise, increasing clouds, with a low around 53. Southwest wind around 6 mph becoming calm in the evening.
Thursday
Widespread fog, mainly before 8am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 77. Calm wind becoming southwest 5 to 9 mph in the afternoon.
Thursday Night
Patchy fog after 10pm. Otherwise, partly cloudy, with a low around 54. West southwest wind 3 to 6 mph.
Friday
Areas of fog before 9am. Otherwise, sunny, with a high near 80. Calm wind becoming west southwest 5 to 9 mph in the afternoon.
Friday Night
Patchy fog after 3am. Otherwise, mostly clear, with a low around 54. West southwest wind 5 to 9 mph.
Saturday
Patchy fog before 9am. Otherwise, sunny, with a high near 79.
Saturday Night
Patchy fog after 5am. Otherwise, mostly clear, with a low around 55.
Sunday
Patchy fog before 9am. Otherwise, sunny, with a high near 79.
Sunday Night
Patchy fog after 1am. Otherwise, mostly clear, with a low around 56.
Monday
Patchy drizzle. Patchy fog before 9am. Otherwise, mostly sunny, with a high near 77.
Monday Night
Partly cloudy, with a low around 57.
Tuesday
Patchy drizzle and fog. Mostly sunny, with a high near 76.
Tuesday Night
Patchy drizzle. Partly cloudy, with a low around 55.
Wednesday
Patchy drizzle. Mostly sunny, with a high near 76.
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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:
1:26 pm PDT Sep 3, 2025
Forecast Valid:
7pm PDT Sep 3, 2025-6pm PDT Sep 10, 2025
 
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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