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

79°F

26°C

Humidity 56%
Wind Speed E 5 mph
Barometer 30.05 in
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 28 Aug 2:55 am CDT
Extended Forecast for

3 Miles NNW Denison TX

  • Overnight

    Overnight: Mostly clear, with a steady temperature around 77. Calm wind.

    Low: 77 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 100. Calm wind becoming north around 5 mph in the afternoon.

    High: 100 °F

    Hot

  • Friday Night

    Friday Night: Clear, with a low around 73. East northeast wind around 5 mph.

    Low: 73 °F

    Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 101. East southeast wind around 5 mph.

    High: 101 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 76. Southeast wind around 5 mph.

    Low: 76 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 102. South wind 5 to 10 mph.

    High: 102 °F

    Hot

  • Sunday Night

    Sunday Night: Clear, with a low around 77. South southeast wind 5 to 10 mph.

    Low: 77 °F

    Clear

  • Monday

    Monday: Sunny and hot, with a high near 101. South wind 5 to 10 mph.

    High: 101 °F

    Hot

  • Monday Night

    Monday Night: Clear, with a low around 77. South southeast wind 5 to 10 mph.

    Low: 77 °F

    Clear

Detailed Forecast

Overnight
Mostly clear, with a steady temperature around 77. Calm wind.
Friday
Sunny and hot, with a high near 100. Calm wind becoming north around 5 mph in the afternoon.
Friday Night
Clear, with a low around 73. East northeast wind around 5 mph.
Saturday
Sunny and hot, with a high near 101. East southeast wind around 5 mph.
Saturday Night
Mostly clear, with a low around 76. Southeast wind around 5 mph.
Sunday
Sunny and hot, with a high near 102. South wind 5 to 10 mph.
Sunday Night
Clear, with a low around 77. South southeast wind 5 to 10 mph.
Monday
Sunny and hot, with a high near 101. South wind 5 to 10 mph.
Monday Night
Clear, with a low around 77. South southeast wind 5 to 10 mph.
Tuesday
Sunny and hot, with a high near 99.
Tuesday Night
Mostly clear, with a low around 78.
Wednesday
Sunny and hot, with a high near 99.
Wednesday Night
Mostly clear, with a low around 78.
Thursday
Sunny and hot, with a high near 101.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW Denison TX
 33.8°N 96.58°W (Elev. 643 ft)
Last Update:
1:26 am CDT Aug 28, 2026
Forecast Valid:
3am CDT Aug 28, 2026-6pm CDT Sep 3, 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