Fire Weather Concerns; Record Warmth Spreads

The Plains to the mid-Mississippi Valley continue with warm and dry conditions. Any fires that initiate could spread quickly. The warm temperatures will expand across the Southern Plains into the Southwest where numerous records are expected through the weekend. Meanwhile, a cold front will move southward across the northern Plains and Great Lakes region where some snow will develop this weekend. Read More >

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Clear

75°F

24°C

Humidity 50%
Wind Speed S 5 MPH
Barometer 29.89 in (1012.19 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 28 Feb 04:35 PM PST
Extended Forecast for

Saint Helena CA

  • Tonight

    Tonight: Patchy fog after 11pm.  Otherwise, mostly cloudy, with a low around 52. Calm wind.

    Low: 52 °F

    Patchy Fog

  • Sunday

    Sunday: Areas of dense fog before 9am.  Otherwise, mostly cloudy, with a high near 66. Calm wind becoming west southwest around 5 mph in the afternoon.

    High: 66 °F

    Areas Dense
    Fog then
    Partly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of rain.  Patchy fog after 10pm.  Otherwise, mostly cloudy, with a low around 48. Calm wind.  New precipitation amounts of less than a tenth of an inch possible.

    Low: 48 °F

    Chance Rain
    and Patchy
    Fog

  • Monday

    Monday: Patchy fog before 9am.  Otherwise, partly sunny, with a high near 68. Calm wind.

    High: 68 °F

    Patchy Fog
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Patchy fog after 10pm.  Otherwise, mostly clear, with a low around 46. Calm wind.

    Low: 46 °F

    Patchy Fog

  • Tuesday

    Tuesday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog after 10pm.  Otherwise, mostly cloudy, with a low around 46.

    Low: 46 °F

    Patchy Fog

  • Wednesday

    Wednesday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 52. Calm wind.
Sunday
Areas of dense fog before 9am. Otherwise, mostly cloudy, with a high near 66. Calm wind becoming west southwest around 5 mph in the afternoon.
Sunday Night
A 30 percent chance of rain. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 48. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Monday
Patchy fog before 9am. Otherwise, partly sunny, with a high near 68. Calm wind.
Monday Night
Patchy fog after 10pm. Otherwise, mostly clear, with a low around 46. Calm wind.
Tuesday
Mostly sunny, with a high near 68.
Tuesday Night
Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 46.
Wednesday
Mostly sunny, with a high near 68.
Wednesday Night
Mostly clear, with a low around 45.
Thursday
Sunny, with a high near 69.
Thursday Night
Mostly clear, with a low around 48.
Friday
Sunny, with a high near 72.
Friday Night
Mostly clear, with a low around 51.
Saturday
Sunny, with a high near 74.
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Helena CA
 38.51°N 122.46°W (Elev. 203 ft)
12:26 pm PST Feb 28, 2026
4pm PST Feb 28, 2026-6pm PST Mar 7, 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