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

Showers and Storms in the East; Dangerously Hot and Dry in the West

Scattered showers and storms are expected across portions of the Central and Eastern U.S. through the end of the week. Meanwhile, dangerous heat will intensify across the Desert Southwest and Intermountain West. Hot, dry weather and increasing winds will allow elevated wildfire conditions to return to the northern Intermountain West, where air quality issues persist from ongoing fires. Read More >

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fair

93°F

34°C

Humidity 50%
Wind Speed Vrbl 7 mph
Barometer 30.06 in
Dewpoint 72°F (22°C)
Visibility 9.00 mi
Heat Index101°F (38°C)
Last update 9 Aug 11:50 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 5 to 10 mph.

    High: 99 °F

    Hot

  • Tonight

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

    Low: 78 °F

    Clear

  • Monday

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

    High: 99 °F

    Hot

  • Monday Night

    Monday Night: Clear, with a low around 79. South wind 5 to 10 mph.

    Low: 79 °F

    Clear

  • Tuesday

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

    High: 99 °F

    Hot

  • Tuesday Night

    Tuesday Night: Clear, with a low around 80. South wind around 10 mph.

    Low: 80 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 99. South southwest wind around 10 mph, with gusts as high as 20 mph.

    High: 99 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 80. South wind 10 to 15 mph.

    Low: 80 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 101. South wind around 15 mph, with gusts as high as 20 mph.

    High: 101 °F

    Hot

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 99. Heat index values as high as 102. South wind 5 to 10 mph.
Tonight
Clear, with a low around 78. South southeast wind around 10 mph.
Monday
Sunny and hot, with a high near 99. Heat index values as high as 102. South southwest wind around 10 mph.
Monday Night
Clear, with a low around 79. South wind 5 to 10 mph.
Tuesday
Sunny and hot, with a high near 99. South wind around 10 mph.
Tuesday Night
Clear, with a low around 80. South wind around 10 mph.
Wednesday
Sunny and hot, with a high near 99. South southwest wind around 10 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 80. South wind 10 to 15 mph.
Thursday
Sunny and hot, with a high near 101. South wind around 15 mph, with gusts as high as 20 mph.
Thursday Night
Mostly clear, with a low around 79.
Friday
Sunny and hot, with a high near 101.
Friday Night
Mostly clear, with a low around 79.
Saturday
Sunny and hot, with a high near 100.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Denison TX
 33.78°N 96.57°W (Elev. 659 ft)
Last Update:
6:11 am CDT Aug 9, 2026
Forecast Valid:
12pm CDT Aug 9, 2026-6pm CDT Aug 15, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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