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

Heat Builds in the West; Extremely Critical Fire Weather in the Northwest

A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Critical to extremely critical fire weather conditions are forecast from the Northwest and the northern Great Basin this weekend. Particularly Dangerous Situation Red Flag Warnings have been issued. Read More >

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

smoke

72°F

22°C

Humidity 53%
Wind Speed S 3 MPH
Barometer 29.87 in (1011.51 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 01 Aug 10:00 PM PDT
Extended Forecast for

Guerneville CA

  • Tonight

    Tonight: Mostly clear, with a low around 58. Northwest wind around 6 mph becoming calm after midnight.

    Low: 58 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 98. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 98 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 57. Calm wind.

    Low: 57 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 94. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 54. Light and variable wind.

    Low: 54 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog after midnight. Otherwise, mostly clear, with a low around 51.

    Low: 51 °F

    Clear then
    Patchy Fog

  • Wednesday

    Wednesday: Areas of fog before 9am. Otherwise, sunny, with a high near 81.

    High: 81 °F

    Areas Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog after 11pm. Otherwise, mostly clear, with a low around 51.

    Low: 51 °F

    Patchy Fog

Detailed Forecast

Tonight
Mostly clear, with a low around 58. Northwest wind around 6 mph becoming calm after midnight.
Sunday
Sunny and hot, with a high near 98. Calm wind becoming southwest around 6 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 57. Calm wind.
Monday
Sunny, with a high near 94. Calm wind becoming southwest around 6 mph in the afternoon.
Monday Night
Mostly clear, with a low around 54. Light and variable wind.
Tuesday
Sunny, with a high near 86.
Tuesday Night
Patchy fog after midnight. Otherwise, mostly clear, with a low around 51.
Wednesday
Areas of fog before 9am. Otherwise, sunny, with a high near 81.
Wednesday Night
Patchy fog after 11pm. Otherwise, mostly clear, with a low around 51.
Thursday
Areas of fog before 9am. Otherwise, sunny, with a high near 83.
Thursday Night
Mostly clear, with a low around 53.
Friday
Sunny, with a high near 88.
Friday Night
Mostly clear, with a low around 55.
Saturday
Sunny, with a high near 90.
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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:
8:32 pm PDT Aug 1, 2026
Forecast Valid:
10pm PDT Aug 1, 2026-6pm PDT Aug 8, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation