Severe Weather and Heavy Rain from the Great Lakes to the Mid-Atlantic; Heat Persists in the East

Widespread strong thunderstorms with damaging winds and locally heavy rain are expected from the Upper Ohio Valley into the southern Mid-Atlantic today and portions of the central Appalachians and Carolinas on Saturday. Monsoonal moisture will bring a flash flooding threat to the Desert Southwest. Sweltering heat persists from the Plains to the southern Mid-Atlantic through tonight. Read More >

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Clear

57°F

14°C

Humidity 87%
Wind Speed N 0 MPH
Barometer 29.96 in (1014.56 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 04 Sep 11:00 PM PDT
Extended Forecast for

Saint Helena CA

  • Tonight

    Tonight: Mostly clear, with a low around 49. Calm wind.

    Low: 49 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 78. Calm wind becoming west southwest around 5 mph in the afternoon.

    High: 78 °F

    Sunny

  • Saturday Night

    Saturday Night: Patchy fog between 3am and 4am.  Otherwise, increasing clouds, with a low around 50. Light and variable wind.

    Low: 50 °F

    Mostly Clear
    then Patchy
    Fog

  • Sunday

    Sunday: Partly sunny, then gradually becoming sunny, with a high near 77. Calm wind becoming west southwest around 5 mph in the afternoon.

    High: 77 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 51. West southwest wind 5 to 7 mph becoming calm  in the evening.

    Low: 51 °F

    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of rain after 11pm.  Partly cloudy, with a low around 57.

    Low: 57 °F

    Slight Chance
    Rain

Detailed Forecast

Tonight
Mostly clear, with a low around 49. Calm wind.
Saturday
Sunny, with a high near 78. Calm wind becoming west southwest around 5 mph in the afternoon.
Saturday Night
Patchy fog between 3am and 4am. Otherwise, increasing clouds, with a low around 50. Light and variable wind.
Sunday
Partly sunny, then gradually becoming sunny, with a high near 77. Calm wind becoming west southwest around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 51. West southwest wind 5 to 7 mph becoming calm in the evening.
Labor Day
Sunny, with a high near 86.
Monday Night
Mostly clear, with a low around 57.
Tuesday
Mostly sunny, with a high near 87.
Tuesday Night
A slight chance of rain after 11pm. Partly cloudy, with a low around 57.
Wednesday
A slight chance of rain. Partly sunny, with a high near 84.
Wednesday Night
A slight chance of rain. Mostly cloudy, with a low around 59.
Thursday
A slight chance of rain. Partly sunny, with a high near 84.
Thursday Night
A slight chance of rain. Partly cloudy, with a low around 57.
Friday
Mostly sunny, with a high near 79.
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Helena CA
 38.49°N 122.48°W (Elev. 318 ft)
1:26 pm PDT Sep 4, 2026
11pm PDT Sep 4, 2026-6pm PDT Sep 11, 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