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Hazardous Weather Conditions

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fair

82°F

28°C

Humidity 66%
Wind Speed S 9 mph
Barometer 30.03 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 14 Sep 2:55 am CDT
Extended Forecast for

Sherman TXSimilar City Names

Heat Advisory September 14, 03:15am until September 14, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 14, 03:15am until September 14, 08:00pm

    NOW until 8:00pm Mon

    Heat Advisory

  • Overnight

    Low: 82 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 100. Heat index values as high as 105. South wind 5 to 15 mph.

    High: 100 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 78. South wind 10 to 15 mph.

    Low: 78 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 100. Heat index values as high as 107. South wind 5 to 10 mph.

    High: 100 °F

    Hot

  • Tuesday Night

    Tuesday Night: Clear, with a low around 78. South southeast wind 5 to 10 mph.

    Low: 78 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 99. South wind 5 to 10 mph.

    High: 99 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 77. Southeast wind 5 to 10 mph.

    Low: 77 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 97. South wind around 5 mph.

    High: 97 °F

    Sunny

Detailed Forecast

Overnight
Mostly clear, with a steady temperature around 82. South wind around 5 mph.
Monday
Sunny and hot, with a high near 100. Heat index values as high as 105. South wind 5 to 15 mph.
Monday Night
Mostly clear, with a low around 78. South wind 10 to 15 mph.
Tuesday
Sunny and hot, with a high near 100. Heat index values as high as 107. South wind 5 to 10 mph.
Tuesday Night
Clear, with a low around 78. South southeast wind 5 to 10 mph.
Wednesday
Sunny and hot, with a high near 99. South wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 77. Southeast wind 5 to 10 mph.
Thursday
Sunny, with a high near 97. South wind around 5 mph.
Thursday Night
Mostly clear, with a low around 75. Southeast wind around 5 mph.
Friday
Sunny, with a high near 98.
Friday Night
Mostly clear, with a low around 73.
Saturday
Sunny, with a high near 97.
Saturday Night
Mostly clear, with a low around 73.
Sunday
A 20 percent chance of showers. Mostly sunny, with a high near 94.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sherman TXSimilar City Names
 33.62°N 96.6°W (Elev. 699 ft)
Last Update:
1:26 am CDT Sep 14, 2026
Forecast Valid:
3am CDT Sep 14, 2026-6pm CDT Sep 20, 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