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

Severe Weather and Heavy Rainfall from the Midwest to the Ohio Valley; Mid-Summer Heat Continues

Severe thunderstorm and heavy rainfall threats will persist from the Midwest to Lower Great Lakes through Monday, shifting into the Ohio Valley and Central Appalachians Monday evening into Tuesday. Mid-summer heat will continue across much of the CONUS this week, with record highs possible well into the 100s across the south-central High Plains. Read More >

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fair

78°F

26°C

Humidity 78%
Wind Speed S 9 mph
Barometer 30.04 in
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 10 Aug 4:55 am CDT
Extended Forecast for

Sherman TX

  • Today

    Today: Sunny and hot, with a high near 99. Heat index values as high as 103. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 99 °F

    Hot

  • Tonight

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

    Low: 77 °F

    Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 100. Heat index values as high as 104. South wind around 10 mph.

    High: 100 °F

    Hot

  • Tuesday Night

    Tuesday Night: Clear, with a low around 79. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 79 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 100. South southwest wind around 10 mph, with gusts as high as 20 mph.

    High: 100 °F

    Hot

  • Wednesday Night

    Wednesday Night: Clear, with a low around 79. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 79 °F

    Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 101. South wind around 15 mph, with gusts as high as 20 mph.

    High: 101 °F

    Hot

  • Thursday Night

    Thursday Night: Clear, with a low around 77. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 77 °F

    Clear

  • Friday

    Friday: Sunny and hot, with a high near 100. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 100 °F

    Hot

Detailed Forecast

Today
Sunny and hot, with a high near 99. Heat index values as high as 103. South wind 5 to 10 mph, with gusts as high as 20 mph.
Tonight
Clear, with a low around 77. South southeast wind around 10 mph.
Tuesday
Sunny and hot, with a high near 100. Heat index values as high as 104. South wind around 10 mph.
Tuesday Night
Clear, with a low around 79. South wind around 10 mph, with gusts as high as 20 mph.
Wednesday
Sunny and hot, with a high near 100. South southwest wind around 10 mph, with gusts as high as 20 mph.
Wednesday Night
Clear, with a low around 79. South wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday
Sunny and hot, with a high near 101. South wind around 15 mph, with gusts as high as 20 mph.
Thursday Night
Clear, with a low around 77. South wind 10 to 15 mph, with gusts as high as 20 mph.
Friday
Sunny and hot, with a high near 100. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Friday Night
Clear, with a low around 78.
Saturday
Sunny and hot, with a high near 100.
Saturday Night
Mostly clear, with a low around 78.
Sunday
Sunny and hot, with a high near 100.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sherman TX
 33.62°N 96.63°W (Elev. 748 ft)
Last Update:
4:46 am CDT Aug 10, 2026
Forecast Valid:
5am CDT Aug 10, 2026-6pm CDT Aug 16, 2026
 
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Additional Resources

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Chance of Precipitation