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

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fair

77°F

25°C

Humidity 83%
Wind Speed S 16 mph
Barometer 29.94 in
Dewpoint 72°F (22°C)
Visibility 9.00 mi
Heat Index78°F (26°C)
Last update 26 Jun 7:50 am CDT
Extended Forecast for

Grayson County Airport TX

  • Today

    Today: Mostly sunny, with a high near 91. Heat index values as high as 100. South southwest wind around 15 mph, with gusts as high as 25 mph.

    High: 91 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 77. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 77 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 93. Heat index values as high as 100. South wind around 15 mph, with gusts as high as 25 mph.

    High: 93 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 76. South wind around 15 mph, with gusts as high as 25 mph.

    Low: 76 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 95. South wind around 15 mph, with gusts as high as 25 mph.

    High: 95 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 77. South wind around 15 mph, with gusts as high as 25 mph.

    Low: 77 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 96. South wind around 15 mph, with gusts as high as 25 mph.

    High: 96 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 78. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 78 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 97. South wind around 10 mph.

    High: 97 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 91. Heat index values as high as 100. South southwest wind around 15 mph, with gusts as high as 25 mph.
Tonight
Partly cloudy, with a low around 77. South wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday
Sunny, with a high near 93. Heat index values as high as 100. South wind around 15 mph, with gusts as high as 25 mph.
Saturday Night
Mostly clear, with a low around 76. South wind around 15 mph, with gusts as high as 25 mph.
Sunday
Sunny, with a high near 95. South wind around 15 mph, with gusts as high as 25 mph.
Sunday Night
Clear, with a low around 77. South wind around 15 mph, with gusts as high as 25 mph.
Monday
Sunny, with a high near 96. South wind around 15 mph, with gusts as high as 25 mph.
Monday Night
Clear, with a low around 78. South wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 97. South wind around 10 mph.
Tuesday Night
Clear, with a low around 78.
Wednesday
Sunny, with a high near 96.
Wednesday Night
Mostly clear, with a low around 78.
Thursday
Sunny, with a high near 95.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grayson County Airport TX
 33.71°N 96.68°W (Elev. 751 ft)
Last Update:
6:06 am CDT Jun 26, 2026
Forecast Valid:
8am CDT Jun 26, 2026-6pm CDT Jul 2, 2026
 
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