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

88°F

31°C

Humidity 44%
Wind Speed SE 9 mph
Barometer 30.03 in
Dewpoint 63°F (17°C)
Visibility 9.00 mi
Heat Index89°F (32°C)
Last update 6 Aug 10:35 pm CDT
Extended Forecast for

3 Miles SSW Knollwood TX

  • Tonight

    Tonight: Mostly clear, with a low around 78. South wind around 5 mph.

    Low: 78 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 99. South wind around 5 mph.

    High: 99 °F

    Hot

  • Friday Night

    Friday Night: A 10 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 78. South wind around 5 mph.

    Low: 78 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: Sunny, with a high near 98. Heat index values as high as 103. South southwest wind around 5 mph.

    High: 98 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 77. Southeast wind around 5 mph.

    Low: 77 °F

    Mostly Clear

  • Sunday

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

    High: 98 °F

    Sunny

  • Sunday Night

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

    Low: 77 °F

    Clear

  • Monday

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

    High: 97 °F

    Sunny

  • Monday Night

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

    Low: 77 °F

    Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 78. South wind around 5 mph.
Friday
Sunny and hot, with a high near 99. South wind around 5 mph.
Friday Night
A 10 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 78. South wind around 5 mph.
Saturday
Sunny, with a high near 98. Heat index values as high as 103. South southwest wind around 5 mph.
Saturday Night
Mostly clear, with a low around 77. Southeast wind around 5 mph.
Sunday
Sunny, with a high near 98. South wind 5 to 10 mph.
Sunday Night
Clear, with a low around 77. South southeast wind 5 to 10 mph.
Monday
Sunny, with a high near 97. South wind around 10 mph.
Monday Night
Clear, with a low around 77. South southeast wind around 10 mph.
Tuesday
Sunny, with a high near 98.
Tuesday Night
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 99.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Knollwood TX
 33.66°N 96.63°W (Elev. 771 ft)
Last Update:
6:12 pm CDT Aug 6, 2026
Forecast Valid:
10pm CDT Aug 6, 2026-6pm CDT Aug 13, 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