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 >

Hazardous Weather Conditions

Current conditions at

KF6YUA Sebastopol (AR323)

Lat: 38.38033°NLon: 122.82367°WElev: 235.3ft.

NA

83°F

28°C

Humidity 42%
Wind Speed E 0 MPH
Barometer 29.92 in (1013.21 mb)
Dewpoint 58°F (14°C)
Visibility NA
Heat Index83°F (28°C)
Last update 20 Mar 06:25 PM PDT
Extended Forecast for

Graton CA

Heat Advisory March 20, 06:36pm until March 20, 08:00pm
Click here for hazard details and duration
...
  •  
    Heat Advisory March 20, 06:36pm until March 20, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Tonight

    Low: 55 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Mostly sunny, with a high near 82. Light west northwest wind becoming northwest 5 to 9 mph in the morning. Winds could gust as high as 21 mph.

    High: 82 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 47. West northwest wind 5 to 9 mph becoming calm after midnight. Winds could gust as high as 20 mph.

    Low: 47 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 77. Light and variable wind.

    High: 77 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 46. West southwest wind around 5 mph becoming calm in the evening.

    Low: 46 °F

    Mostly Clear

  • Monday

    Monday: Patchy dense fog before 8am. Otherwise, sunny, with a high near 77.

    High: 77 °F

    Patchy Dense
    Fog then
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 49.

    Low: 49 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

Detailed Forecast

Tonight
Increasing clouds, with a low around 55. Light and variable wind.
Saturday
Mostly sunny, with a high near 82. Light west northwest wind becoming northwest 5 to 9 mph in the morning. Winds could gust as high as 21 mph.
Saturday Night
Mostly clear, with a low around 47. West northwest wind 5 to 9 mph becoming calm after midnight. Winds could gust as high as 20 mph.
Sunday
Sunny, with a high near 77. Light and variable wind.
Sunday Night
Mostly clear, with a low around 46. West southwest wind around 5 mph becoming calm in the evening.
Monday
Patchy dense fog before 8am. Otherwise, sunny, with a high near 77.
Monday Night
Mostly clear, with a low around 49.
Tuesday
Sunny, with a high near 78.
Tuesday Night
Partly cloudy, with a low around 49.
Wednesday
Mostly sunny, with a high near 76.
Wednesday Night
Partly cloudy, with a low around 46.
Thursday
Mostly sunny, with a high near 78.
Thursday Night
Mostly cloudy, with a low around 48.
Friday
Mostly sunny, with a high near 78.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Graton CA
 38.45°N 122.88°W (Elev. 95 ft)
Last Update:
2:07 pm PDT Mar 20, 2026
Forecast Valid:
6pm PDT Mar 20, 2026-6pm PDT Mar 27, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation