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

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 >

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Clear

81°F

27°C

Humidity 26%
Wind Speed N 14 MPH
Barometer 29.93 in (1013.55 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 21 Mar 05:30 PM PDT
Extended Forecast for

7 Miles WSW Saint Helena CA

  • Tonight

    Tonight: Mostly clear, with a low around 54. West northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 54 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 79. Calm wind becoming west southwest around 5 mph in the afternoon.

    High: 79 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 52. Light west wind.

    Low: 52 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 78. Calm wind becoming west southwest around 6 mph in the afternoon.

    High: 78 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 55. West southwest wind 5 to 7 mph becoming calm in the evening.

    Low: 55 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 54. West northwest wind 5 to 7 mph becoming calm in the evening.
Sunday
Sunny, with a high near 79. Calm wind becoming west southwest around 5 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 52. Light west wind.
Monday
Sunny, with a high near 78. Calm wind becoming west southwest around 6 mph in the afternoon.
Monday Night
Mostly clear, with a low around 55. West southwest wind 5 to 7 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 79.
Tuesday Night
Partly cloudy, with a low around 55.
Wednesday
Mostly sunny, with a high near 78.
Wednesday Night
Partly cloudy, with a low around 50.
Thursday
Mostly sunny, with a high near 78.
Thursday Night
Mostly cloudy, with a low around 53.
Friday
Mostly sunny, with a high near 79.
Friday Night
Mostly cloudy, with a low around 53.
Saturday
Mostly sunny, with a high near 78.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
7 Miles WSW Saint Helena CA
 38.45°N 122.59°W (Elev. 535 ft)
Last Update:
2:07 pm PDT Mar 21, 2026
Forecast Valid:
5pm PDT Mar 21, 2026-6pm PDT Mar 28, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation