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Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fair

74°F

23°C

Humidity 98%
Wind Speed N 3 mph
Barometer 29.95 in
Dewpoint 74°F (23°C)
Visibility 9.00 mi
Last update 11 Sep 12:35 am CDT
Extended Forecast for

Sherman TX

  • Overnight

    Overnight: A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 72. Calm wind.

    Low: 72 °F

    Slight Chance
    T-storms

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms before 10am. Mostly sunny, with a high near 96. Heat index values as high as 99. East southeast wind around 5 mph becoming south in the afternoon.

    High: 96 °F

    Slight Chance
    T-storms then
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 76. West wind around 5 mph becoming southeast in the evening.

    Low: 76 °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 77. South wind around 5 mph.

    Low: 77 °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: Mostly clear, with a low around 77. South southeast wind 5 to 10 mph.

    Low: 77 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 98. South wind 10 to 15 mph.

    High: 98 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 77. South southeast wind 10 to 15 mph.

    Low: 77 °F

    Clear

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 72. Calm wind.
Friday
A 20 percent chance of showers and thunderstorms before 10am. Mostly sunny, with a high near 96. Heat index values as high as 99. East southeast wind around 5 mph becoming south in the afternoon.
Friday Night
Mostly clear, with a low around 76. West wind around 5 mph becoming southeast in the evening.
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 77. South wind around 5 mph.
Sunday
Sunny and hot, with a high near 99. South wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 77. South southeast wind 5 to 10 mph.
Monday
Sunny, with a high near 98. South wind 10 to 15 mph.
Monday Night
Clear, with a low around 77. South southeast wind 10 to 15 mph.
Tuesday
Sunny and hot, with a high near 99.
Tuesday Night
Clear, with a low around 77.
Wednesday
Sunny, with a high near 98.
Wednesday Night
Mostly clear, with a low around 76.
Thursday
Sunny, with a high near 96.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sherman TX
 33.64°N 96.6°W (Elev. 732 ft)
Last Update:
11:41 pm CDT Sep 10, 2026
Forecast Valid:
12am CDT Sep 11, 2026-6pm CDT Sep 17, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation