Showers and Storms continue across the East; Heat, Critical Fire Weather, Drought, and Poor Air Quality continues in the West

A series of fronts will focus locally heavy showers and storms across portions of the central and eastern U.S. through the end of the workweek. Dangerous to extreme heat continues across the Southwest U.S., eventually spreading eastward over the weekend into early next week. Elevated fire weather conditions continue across the Great Basin, with degraded air quality lingering across the Northwest. Read More >

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fair

90°F

32°C

Humidity 59%
Wind Speed S 9 mph
Barometer 30.03 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index99°F (37°C)
Last update 5 Aug 9:50 am CDT
Extended Forecast for

Denison TX

  • This Afternoon

    This Afternoon: Sunny and hot, with a high near 99. Heat index values as high as 102. South wind around 10 mph.

    High: 99 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 80. South southeast wind around 5 mph.

    Low: 80 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 100. Heat index values as high as 103. South southwest wind 5 to 10 mph.

    High: 100 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 78. South southeast wind 5 to 10 mph.

    Low: 78 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 99. South wind around 5 mph.

    High: 99 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 79. South southeast wind around 5 mph.

    Low: 79 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 99. South southwest wind around 5 mph.

    High: 99 °F

    Hot

  • Saturday Night

    Saturday Night: Clear, with a low around 79. South southeast wind around 5 mph.

    Low: 79 °F

    Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 99. South southwest wind 5 to 10 mph.

    High: 99 °F

    Hot

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 99. Heat index values as high as 102. South wind around 10 mph.
Tonight
Mostly clear, with a low around 80. South southeast wind around 5 mph.
Thursday
Sunny and hot, with a high near 100. Heat index values as high as 103. South southwest wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 78. South southeast wind 5 to 10 mph.
Friday
Sunny and hot, with a high near 99. South wind around 5 mph.
Friday Night
Mostly clear, with a low around 79. South southeast wind around 5 mph.
Saturday
Sunny and hot, with a high near 99. South southwest wind around 5 mph.
Saturday Night
Clear, with a low around 79. South southeast wind around 5 mph.
Sunday
Sunny and hot, with a high near 99. South southwest wind 5 to 10 mph.
Sunday Night
Clear, with a low around 79.
Monday
Sunny, with a high near 98.
Monday Night
Clear, with a low around 79.
Tuesday
Sunny, with a high near 98.
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ABOUT THIS FORECAST

 
Point Forecast:
Denison TX
 33.75°N 96.57°W (Elev. 748 ft)
6:11 am CDT Aug 5, 2026
12pm CDT Aug 5, 2026-6pm CDT Aug 11, 2026
 
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Additional Resources

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