Thunderstorms and Heavy Rains Across Portions of the Central and Eastern US; Heat Expands to Portions of the East

Widespread showers and thunderstorms, some severe, may produce heavy downpours and flash flooding across much of the eastern and central U.S. Dangerous heat will continue in the Pacific Northwest and expand across portions of the East. Deep tropical moisture and associated thunderstorms will bring heavy rainfall and localized flash flooding across portions of Florida into the central Gulf Coast. Read More >

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Mostly Cloudy

82°F

28°C

Humidity 75%
Wind Speed W 7 mph
Barometer 29.97 in
Dewpoint 73°F (23°C)
Visibility 9.00 mi
Heat Index88°F (31°C)
Last update 15 Jul 10:15 pm CDT
Extended Forecast for

Grayson County Airport TX

  • Tonight

    Tonight: Mostly clear, with a low around 75. South wind 5 to 10 mph.

    Low: 75 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 94. Heat index values as high as 102. South wind 10 to 15 mph.

    High: 94 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 75. South wind 5 to 10 mph.

    Low: 75 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 95. Heat index values as high as 100. South wind 5 to 10 mph.

    High: 95 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 74. South southeast wind 5 to 10 mph becoming light south  after midnight.

    Low: 74 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 96. Calm wind becoming south southeast around 5 mph in the morning.

    High: 96 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 75. Southeast wind around 5 mph.

    Low: 75 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 96. South southwest wind 5 to 10 mph.

    High: 96 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 78. South southeast wind around 10 mph.

    Low: 78 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 75. South wind 5 to 10 mph.
Wednesday
Sunny, with a high near 94. Heat index values as high as 102. South wind 10 to 15 mph.
Wednesday Night
Mostly clear, with a low around 75. South wind 5 to 10 mph.
Thursday
Sunny, with a high near 95. Heat index values as high as 100. South wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 74. South southeast wind 5 to 10 mph becoming light south after midnight.
Friday
Sunny, with a high near 96. Calm wind becoming south southeast around 5 mph in the morning.
Friday Night
Partly cloudy, with a low around 75. Southeast wind around 5 mph.
Saturday
Mostly sunny, with a high near 96. South southwest wind 5 to 10 mph.
Saturday Night
Mostly clear, with a low around 78. South southeast wind around 10 mph.
Sunday
Sunny, with a high near 98.
Sunday Night
Mostly clear, with a low around 77.
Monday
Mostly sunny, with a high near 97.
Monday Night
Mostly clear, with a low around 77.
Tuesday
Sunny, with a high near 98.
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ABOUT THIS FORECAST

 
Point Forecast:
Grayson County Airport TX
 33.71°N 96.66°W (Elev. 797 ft)
7:38 pm CDT Jul 15, 2025
10pm CDT Jul 15, 2025-6pm CDT Jul 22, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database