Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Plains to the Upper Midwest

A significant and dangerous heat wave will expand from the Central U.S. into the Eastern U.S and linger through much of the work week. Numerous daily record highs and warm lows are likely. Severe thunderstorms are possible from the southern Plains through the Upper Mississippi Valley. Fire weather concerns are expected to persist across the Four Corners region. Read More >

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fair

77°F

25°C

Humidity 81%
Wind Speed S 12 mph
Barometer 30.09 in
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 23 Jun 2:15 am CDT
Extended Forecast for

Denison TX

  • Overnight

    Overnight: Mostly clear, with a low around 75. South wind around 10 mph.

    Low: 75 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 92. Heat index values as high as 100. South wind 5 to 10 mph.

    High: 92 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 75. South southeast wind 5 to 10 mph.

    Low: 75 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 92. Heat index values as high as 98. South wind 5 to 10 mph.

    High: 92 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 74. Southeast wind around 5 mph.

    Low: 74 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 93. South southeast wind 5 to 10 mph.

    High: 93 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 74. Southeast wind 5 to 10 mph.

    Low: 74 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 94. South wind 5 to 10 mph.

    High: 94 °F

    Sunny

  • Thursday Night

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

    Low: 76 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 75. South wind around 10 mph.
Monday
Sunny, with a high near 92. Heat index values as high as 100. South wind 5 to 10 mph.
Monday Night
Clear, with a low around 75. South southeast wind 5 to 10 mph.
Tuesday
Sunny, with a high near 92. Heat index values as high as 98. South wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 74. Southeast wind around 5 mph.
Wednesday
Sunny, with a high near 93. South southeast wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 74. Southeast wind 5 to 10 mph.
Thursday
Sunny, with a high near 94. South wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 76. South southeast wind 5 to 10 mph.
Friday
Sunny, with a high near 95.
Friday Night
Mostly clear, with a low around 76.
Saturday
Sunny, with a high near 96.
Saturday Night
Mostly clear, with a low around 77.
Sunday
Sunny, with a high near 96.
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ABOUT THIS FORECAST

 
Point Forecast:
Denison TX
 33.75°N 96.57°W (Elev. 748 ft)
11:23 pm CDT Jun 22, 2025
2am CDT Jun 23, 2025-6pm CDT Jun 29, 2025
 
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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