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

Areas of Thunderstorms and Heavy Rain Across the Country; Heat Wave Begins This Weekend

Widespread showers and thunderstorms, some severe, may bring heavy rain and flash flooding in the central Gulf Coast, Mid-Atlantic, the Upper Midwest, the Great Basin and Southwest. A stretch of unusually hot and humid weather is expected across portions of the central U.S. and the Southeast beginning this weekend. Critical fire weather conditions are expected in the Northwest and Great Basin. Read More >

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fair

86°F

30°C

Humidity 59%
Wind Speed SE 8 mph
Barometer 29.97 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index91°F (33°C)
Last update 17 Jul 8:55 pm CDT
Extended Forecast for

3 Miles NNE Collinsville TX

  • Tonight

    Tonight: Mostly clear, with a low around 73. South southeast wind around 5 mph becoming calm.

    Low: 73 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 98. Heat index values as high as 103. Calm wind becoming south around 5 mph in the afternoon.

    High: 98 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 74. South wind around 5 mph.

    Low: 74 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 96. Heat index values as high as 103. South wind 5 to 10 mph.

    High: 96 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 76. South wind 5 to 10 mph.

    Low: 76 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 96. South southwest wind around 10 mph, with gusts as high as 20 mph.

    High: 96 °F

    Sunny

  • Sunday Night

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

    Low: 77 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 96. South wind around 10 mph, with gusts as high as 20 mph.

    High: 96 °F

    Sunny

  • Monday Night

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

    Low: 77 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 73. South southeast wind around 5 mph becoming calm.
Friday
Sunny, with a high near 98. Heat index values as high as 103. Calm wind becoming south around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 74. South wind around 5 mph.
Saturday
Sunny, with a high near 96. Heat index values as high as 103. South wind 5 to 10 mph.
Saturday Night
Mostly clear, with a low around 76. South wind 5 to 10 mph.
Sunday
Sunny, with a high near 96. South southwest wind around 10 mph, with gusts as high as 20 mph.
Sunday Night
Mostly clear, with a low around 77. South wind 5 to 10 mph.
Monday
Sunny, with a high near 96. South wind around 10 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear, with a low around 77. South wind 5 to 10 mph.
Tuesday
Sunny, with a high near 97.
Tuesday Night
Mostly clear, with a low around 76.
Wednesday
Sunny, with a high near 98.
Wednesday Night
Mostly clear, with a low around 75.
Thursday
Mostly sunny, with a high near 98.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE Collinsville TX
 33.61°N 96.9°W (Elev. 735 ft)
Last Update:
12:25 pm CDT Jul 17, 2025
Forecast Valid:
9pm CDT Jul 17, 2025-6pm CDT Jul 24, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation