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Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

A Few Clouds

84°F

29°C

Humidity 70%
Wind Speed SW 5 mph
Barometer 29.94 in
Dewpoint 73°F (23°C)
Visibility 8.00 mi
Heat Index90°F (32°C)
Last update 11 Sep 10:50 am CDT
Extended Forecast for

5 Miles WSW Grayson County Airport TX

  • Today

    Today: Sunny, with a high near 95. Heat index values as high as 100. South wind around 5 mph.

    High: 95 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 75. East southeast wind around 5 mph becoming south after midnight.

    Low: 75 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 100. Heat index values as high as 104. South wind 5 to 10 mph.

    High: 100 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 76. South southeast wind 5 to 10 mph.

    Low: 76 °F

    Mostly Clear

  • Sunday

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

    High: 99 °F

    Hot

  • Sunday Night

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

    Low: 76 °F

    Clear

  • Monday

    Monday: Sunny and hot, with a high near 99. South wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 99 °F

    Hot

  • Monday Night

    Monday Night: Clear, with a low around 76. South wind 10 to 15 mph.

    Low: 76 °F

    Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 99. South wind around 10 mph.

    High: 99 °F

    Hot

Detailed Forecast

Today
Sunny, with a high near 95. Heat index values as high as 100. South wind around 5 mph.
Tonight
Mostly clear, with a low around 75. East southeast wind around 5 mph becoming south after midnight.
Saturday
Sunny and hot, with a high near 100. Heat index values as high as 104. South wind 5 to 10 mph.
Saturday Night
Mostly clear, with a low around 76. South southeast wind 5 to 10 mph.
Sunday
Sunny and hot, with a high near 99. South wind 5 to 10 mph.
Sunday Night
Clear, with a low around 76. South southeast wind around 10 mph.
Monday
Sunny and hot, with a high near 99. South wind 10 to 15 mph, with gusts as high as 20 mph.
Monday Night
Clear, with a low around 76. South wind 10 to 15 mph.
Tuesday
Sunny and hot, with a high near 99. South wind around 10 mph.
Tuesday Night
Mostly clear, with a low around 76.
Wednesday
Sunny, with a high near 98.
Wednesday Night
Mostly clear, with a low around 76.
Thursday
Sunny, with a high near 97.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW Grayson County Airport TX
 33.71°N 96.76°W (Elev. 699 ft)
Last Update:
8:36 am CDT Sep 11, 2026
Forecast Valid:
11am CDT Sep 11, 2026-6pm CDT Sep 17, 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