Heat Persists in the Southwest; Elevated to Critical Fire Weather in the Great Basin; Poor Air Quality in the West

Dangerous heat will persist across the Southwest U.S. through this week, easing by next week. The heat will focus further east in the Great Plains and Mississippi Valley beginning next week. Elevated to locally critical fire weather conditions will persist for the Great Basin today. Poor air quality lingers for the Northwest, Great Basin, Central Rockies into the Plains. Read More >

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fair

99°F

37°C

Humidity 33%
Wind Speed S 8 mph
Barometer 29.96 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index102°F (39°C)
Last update 4 Aug 12:55 pm CDT
Extended Forecast for

Sherman TX

  • This Afternoon

    This Afternoon: Sunny and hot, with a high near 100. South southeast wind around 5 mph.

    High: 100 °F

    Hot

  • Tonight

    Tonight: 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 100. Heat index values as high as 103. Southwest wind 5 to 10 mph.

    High: 100 °F

    Hot

  • Wednesday Night

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

    Low: 78 °F

    Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 100. South wind 5 to 10 mph.

    High: 100 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 78. South southeast wind 5 to 10 mph.

    Low: 78 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 98. South wind 5 to 10 mph.

    High: 98 °F

    Sunny

  • Friday Night

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

    Low: 76 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 98. South southwest wind around 5 mph.

    High: 98 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 100. South southeast wind around 5 mph.
Tonight
Clear, with a low around 78. South southeast wind 5 to 10 mph.
Wednesday
Sunny and hot, with a high near 100. Heat index values as high as 103. Southwest wind 5 to 10 mph.
Wednesday Night
Clear, with a low around 78. South southeast wind 5 to 10 mph.
Thursday
Sunny and hot, with a high near 100. South wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 78. South southeast wind 5 to 10 mph.
Friday
Sunny, with a high near 98. South wind 5 to 10 mph.
Friday Night
Mostly clear, with a low around 76. South southeast wind 5 to 10 mph.
Saturday
Sunny, with a high near 98. South southwest wind around 5 mph.
Saturday Night
Mostly clear, with a low around 77.
Sunday
Sunny, with a high near 98.
Sunday Night
Clear, with a low around 77.
Monday
Sunny, with a high near 98.
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ABOUT THIS FORECAST

 
Point Forecast:
Sherman TX
 33.62°N 96.6°W (Elev. 699 ft)
1:26 pm CDT Aug 4, 2026
1pm CDT Aug 4, 2026-6pm CDT Aug 10, 2026
 
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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