Dangerous Heat in the Southwest; Severe Thunderstorms and Heavy Rain in the Northeast and Mid-Atlantic

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week. Strong to severe thunderstorms may produce damaging wind, hail, a tornado or two, heavy rain and flash flooding across parts of the Mid-Atlantic and Northeast. Heavy rainfall threat continues across the Gulf Coast. Read More >

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fair

73°F

23°C

Humidity 85%
Wind Speed NE 7 mph
Barometer 29.99 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 27 Aug 6:35 am CDT
Extended Forecast for

Dorchester TX

  • Today

    Today: Sunny, with a high near 97. Heat index values as high as 101. Northeast wind 5 to 10 mph.

    High: 97 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 74. East northeast wind 5 to 10 mph.

    Low: 74 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 97. East wind around 5 mph.

    High: 97 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 74. East wind around 5 mph.

    Low: 74 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 97. South southeast wind around 5 mph.

    High: 97 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 76. Southeast wind around 10 mph.

    Low: 76 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 98. South wind around 10 mph.

    High: 98 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 76. South southeast wind around 10 mph.

    Low: 76 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 96. South wind around 10 mph.

    High: 96 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 97. Heat index values as high as 101. Northeast wind 5 to 10 mph.
Tonight
Mostly clear, with a low around 74. East northeast wind 5 to 10 mph.
Friday
Sunny, with a high near 97. East wind around 5 mph.
Friday Night
Mostly clear, with a low around 74. East wind around 5 mph.
Saturday
Sunny, with a high near 97. South southeast wind around 5 mph.
Saturday Night
Mostly clear, with a low around 76. Southeast wind around 10 mph.
Sunday
Sunny, with a high near 98. South wind around 10 mph.
Sunday Night
Clear, with a low around 76. South southeast wind around 10 mph.
Monday
Sunny, with a high near 96. South wind around 10 mph.
Monday Night
Mostly clear, with a low around 77.
Tuesday
Sunny, with a high near 96.
Tuesday Night
Mostly clear, with a low around 77.
Wednesday
Sunny, with a high near 98.
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ABOUT THIS FORECAST

 
Point Forecast:
Dorchester TX
 33.53°N 96.71°W (Elev. 823 ft)
6:06 am CDT Aug 27, 2026
6am CDT Aug 27, 2026-6pm CDT Sep 2, 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