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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. 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 35%
Wind Speed SE 7 mph
Barometer 29.96 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Heat Index89°F (32°C)
Last update 27 Aug 8:35 pm CDT
Extended Forecast for

3 Miles SE Willis OK

  • Tonight

    Tonight: Mostly clear, with a low around 76. East wind 5 to 10 mph.

    Low: 76 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 97. Heat index values as high as 100. Calm wind becoming east around 5 mph in the afternoon.

    High: 97 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 77. East southeast wind around 5 mph.

    Low: 77 °F

    Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 99. Heat index values as high as 103. South southeast wind around 5 mph.

    High: 99 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 78. Southeast wind 5 to 10 mph.

    Low: 78 °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 79. South southeast wind around 10 mph.

    Low: 79 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 98. South wind 5 to 10 mph.

    High: 98 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 78. South southeast wind around 10 mph.

    Low: 78 °F

    Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 76. East wind 5 to 10 mph.
Friday
Sunny, with a high near 97. Heat index values as high as 100. Calm wind becoming east around 5 mph in the afternoon.
Friday Night
Clear, with a low around 77. East southeast wind around 5 mph.
Saturday
Sunny and hot, with a high near 99. Heat index values as high as 103. South southeast wind around 5 mph.
Saturday Night
Mostly clear, with a low around 78. 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 79. South southeast wind around 10 mph.
Monday
Sunny, with a high near 98. South wind 5 to 10 mph.
Monday Night
Clear, with a low around 78. South southeast wind around 10 mph.
Tuesday
Sunny, with a high near 98.
Tuesday Night
Clear, with a low around 78.
Wednesday
Sunny, with a high near 98.
Wednesday Night
Clear, with a low around 79.
Thursday
Sunny and hot, with a high near 100.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE Willis OK
 33.84°N 96.79°W (Elev. 617 ft)
Last Update:
6:06 pm CDT Aug 27, 2026
Forecast Valid:
8pm CDT Aug 27, 2026-6pm CDT Sep 3, 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