Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Hazardous Weather Conditions

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Clear

82°F

28°C

Humidity 37%
Wind Speed SE 8 MPH
Barometer 29.86 in (1011.18 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 20 Mar 06:15 PM PDT
Extended Forecast for

4 Miles W Saint Helena CA

Heat Advisory March 20, 06:32pm until March 20, 08:00pm
Click here for hazard details and duration
...
  •  
    Heat Advisory March 20, 06:32pm until March 20, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Tonight

    Low: 67 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 77. West wind 5 to 9 mph, with gusts as high as 20 mph.

    High: 77 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 59. West northwest wind 6 to 10 mph, with gusts as high as 18 mph.

    Low: 59 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 74. North northwest wind around 6 mph becoming west southwest in the afternoon.

    High: 74 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 55. West northwest wind around 6 mph.

    Low: 55 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Monday Night

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

    Low: 57 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

Detailed Forecast

Tonight
Mostly clear, with a low around 67. West northwest wind around 6 mph.
Saturday
Mostly sunny, with a high near 77. West wind 5 to 9 mph, with gusts as high as 20 mph.
Saturday Night
Clear, with a low around 59. West northwest wind 6 to 10 mph, with gusts as high as 18 mph.
Sunday
Sunny, with a high near 74. North northwest wind around 6 mph becoming west southwest in the afternoon.
Sunday Night
Mostly clear, with a low around 55. West northwest wind around 6 mph.
Monday
Sunny, with a high near 74.
Monday Night
Mostly clear, with a low around 57.
Tuesday
Sunny, with a high near 75.
Tuesday Night
Partly cloudy, with a low around 57.
Wednesday
Sunny, with a high near 72.
Wednesday Night
Mostly clear, with a low around 55.
Thursday
Mostly sunny, with a high near 74.
Thursday Night
Partly cloudy, with a low around 58.
Friday
Mostly sunny, with a high near 74.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Saint Helena CA
 38.52°N 122.55°W (Elev. 1998 ft)
2:07 pm PDT Mar 20, 2026
6pm PDT Mar 20, 2026-6pm PDT Mar 27, 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