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

Tropical Storm Arthur and Heavy Rainfall in the South; Severe Weather in the Midwest

An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana tonight. Intense tornadoes, swaths of damaging gusts, and hail in excess of 2 inches in diameter possible. Tropical Storm Arthur will continue to produce strong winds across coastal Upper Texas and Louisiana tonight, as well as potentially life-threatening flooding across southern Louisiana into Mississippi. Read More >

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Overcast

55°F

13°C

Humidity 93%
Wind Speed N 0 MPH
Barometer 29.91 in (1012.87 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 18 Jun 06:00 AM PDT
Extended Forecast for

Guerneville CA

  • Today

    Today: Cloudy through mid morning, then gradual clearing, with a high near 71. Calm wind becoming south southwest 5 to 8 mph in the afternoon.

    High: 71 °F

    Gradual
    Clearing

  • Tonight

    Tonight: Increasing clouds, with a low around 55. Southwest wind around 5 mph becoming calm in the evening.

    Low: 55 °F

    Increasing
    Clouds

  • 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: Mostly cloudy, with a low around 52. South southwest wind around 6 mph becoming calm in the evening.

    Low: 52 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 72. Calm wind becoming west southwest 5 to 7 mph in the afternoon.

    High: 72 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Patchy fog after midnight. Otherwise, mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear
    then Patchy
    Fog

  • Sunday

    Sunday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Sunday Night

    Sunday Night: Patchy fog after 3am. Otherwise, mostly clear, with a low around 53.

    Low: 53 °F

    Clear then
    Patchy Fog

  • Monday

    Monday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

Detailed Forecast

Today
Cloudy through mid morning, then gradual clearing, with a high near 71. Calm wind becoming south southwest 5 to 8 mph in the afternoon.
Tonight
Increasing clouds, with a low around 55. Southwest wind around 5 mph becoming calm in the evening.
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
Mostly cloudy, with a low around 52. South southwest wind around 6 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 72. Calm wind becoming west southwest 5 to 7 mph in the afternoon.
Saturday Night
Patchy fog after midnight. Otherwise, mostly clear, with a low around 52.
Sunday
Sunny, with a high near 80.
Sunday Night
Patchy fog after 3am. Otherwise, mostly clear, with a low around 53.
Monday
Sunny, with a high near 78.
Monday Night
Patchy fog after 11pm. Otherwise, mostly clear, with a low around 54.
Tuesday
Patchy fog. Otherwise, mostly sunny, with a high near 78.
Tuesday Night
Patchy fog. Otherwise, mostly clear, with a low around 54.
Wednesday
Patchy fog. Otherwise, sunny, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Guerneville CA
 38.5°N 122.98°W (Elev. 397 ft)
Last Update:
2:56 am PDT Jun 18, 2026
Forecast Valid:
6am PDT Jun 18, 2026-6pm PDT Jun 24, 2026
 
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