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

Remnants of Arthur and Heavy Rainfall Across the South; Fire Weather Threat in the West

Life-threatening, potentially catastrophic flash flooding expected along the central Gulf Coast as the remnants of Arthur track across the area. Isolated brief tornadoes and damaging gusts remain possible overnight in the Southeast. Isolated to scattered dry thunderstorms may cause lightning-ignited fires and erratic behavior due to gusty winds across parts of the West Friday. Read More >

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Overcast

60°F

16°C

Humidity 80%
Wind Speed SW 6 MPH
Barometer 29.95 in (1014.22 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 18 Jun 09:53 PM PDT
Extended Forecast for

Guerneville CA

  • Tonight

    Tonight: Cloudy, with a low around 55. Calm wind.

    Low: 55 °F

    Cloudy

  • Juneteenth

    Juneteenth: Cloudy, then gradually becoming mostly sunny, with a high near 69. Calm wind becoming south southwest 5 to 8 mph in the afternoon.

    High: 69 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Increasing clouds, with a low around 52. South southwest wind around 6 mph becoming calm in the evening.

    Low: 52 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Mostly cloudy through mid morning, then gradual clearing, with a high near 72. Calm wind becoming west southwest 5 to 8 mph in the afternoon.

    High: 72 °F

    Becoming
    Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 51. West southwest wind 5 to 7 mph becoming calm in the evening.

    Low: 51 °F

    Patchy Fog

  • Sunday

    Sunday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Sunday Night

    Sunday Night: Patchy fog after 3am. Otherwise, mostly clear, with a low around 52.

    Low: 52 °F

    Clear then
    Patchy Fog

  • Monday

    Monday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Monday Night

    Monday Night: Patchy fog after midnight. Otherwise, mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear
    then Patchy
    Fog

Detailed Forecast

Tonight
Cloudy, with a low around 55. Calm wind.
Juneteenth
Cloudy, then gradually becoming mostly sunny, with a high near 69. Calm wind becoming south southwest 5 to 8 mph in the afternoon.
Friday Night
Increasing clouds, with a low around 52. South southwest wind around 6 mph becoming calm in the evening.
Saturday
Mostly cloudy through mid morning, then gradual clearing, with a high near 72. Calm wind becoming west southwest 5 to 8 mph in the afternoon.
Saturday Night
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 51. West southwest wind 5 to 7 mph becoming calm in the evening.
Sunday
Sunny, with a high near 79.
Sunday Night
Patchy fog after 3am. Otherwise, mostly clear, with a low around 52.
Monday
Sunny, with a high near 78.
Monday Night
Patchy fog after midnight. Otherwise, mostly clear, with a low around 53.
Tuesday
Mostly sunny, with a high near 78.
Tuesday Night
Patchy fog. Otherwise, mostly clear, with a low around 52.
Wednesday
Patchy fog. Otherwise, sunny, with a high near 80.
Wednesday Night
Patchy fog. Otherwise, mostly clear, with a low around 53.
Thursday
Sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Guerneville CA
 38.5°N 122.98°W (Elev. 397 ft)
Last Update:
1:26 pm PDT Jun 18, 2026
Forecast Valid:
10pm PDT Jun 18, 2026-6pm PDT Jun 25, 2026
 
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