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.

Mist

55°F

13°C

Humidity 93%
Wind Speed N 0 MPH
Barometer 29.91 in (1012.87 mb)
Dewpoint 54°F (12°C)
Visibility 6.00 mi
Last update 18 Jun 05:35 AM PDT
Extended Forecast for

Saint Helena CA

  • Today

    Today: Patchy fog before 8am.  Otherwise, cloudy through mid morning, then gradual clearing, with a high near 79. Calm wind becoming west southwest 5 to 7 mph in the afternoon.

    High: 79 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: Patchy fog after 2am.  Otherwise, increasing clouds, with a low around 52. West southwest wind 5 to 7 mph becoming calm  after midnight.

    Low: 52 °F

    Mostly Clear
    then Patchy
    Fog

  • Juneteenth

    Juneteenth: Patchy fog between 7am and 8am.  Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 74. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 74 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Patchy fog after 1am.  Otherwise, partly cloudy, with a low around 51. West southwest wind 5 to 7 mph becoming calm  in the evening. Winds could gust as high as 18 mph.

    Low: 51 °F

    Mostly Clear
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 8am.  Otherwise, sunny, with a high near 78. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 78 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Patchy fog after midnight.  Otherwise, mostly clear, with a low around 50.

    Low: 50 °F

    Clear then
    Patchy Fog

  • Sunday

    Sunday: Patchy fog before 8am.  Otherwise, sunny, with a high near 86.

    High: 86 °F

    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Widespread fog, mainly after 3am.  Otherwise, mostly clear, with a low around 51.

    Low: 51 °F

    Clear then
    Fog

  • Monday

    Monday: Areas of fog before 8am.  Otherwise, sunny, with a high near 88.

    High: 88 °F

    Areas Fog
    then Sunny

Detailed Forecast

Today
Patchy fog before 8am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 79. Calm wind becoming west southwest 5 to 7 mph in the afternoon.
Tonight
Patchy fog after 2am. Otherwise, increasing clouds, with a low around 52. West southwest wind 5 to 7 mph becoming calm after midnight.
Juneteenth
Patchy fog between 7am and 8am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 74. Calm wind becoming southwest around 6 mph in the afternoon.
Friday Night
Patchy fog after 1am. Otherwise, partly cloudy, with a low around 51. West southwest wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 18 mph.
Saturday
Patchy fog before 8am. Otherwise, sunny, with a high near 78. Calm wind becoming southwest around 5 mph in the afternoon.
Saturday Night
Patchy fog after midnight. Otherwise, mostly clear, with a low around 50.
Sunday
Patchy fog before 8am. Otherwise, sunny, with a high near 86.
Sunday Night
Widespread fog, mainly after 3am. Otherwise, mostly clear, with a low around 51.
Monday
Areas of fog before 8am. Otherwise, sunny, with a high near 88.
Monday Night
Widespread fog, mainly after 3am. Otherwise, mostly clear, with a low around 52.
Tuesday
Areas of fog. Otherwise, sunny, with a high near 89.
Tuesday Night
Widespread fog. Otherwise, mostly clear, with a low around 53.
Wednesday
Patchy fog. Otherwise, sunny, with a high near 92.
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Helena CA
 38.49°N 122.45°W (Elev. 230 ft)
2:56 am PDT Jun 18, 2026
5am PDT Jun 18, 2026-6pm PDT Jun 24, 2026
 
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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