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

Extreme Heat and Excessive Rainfall Today

Dangerous and extreme heat will remain across portions of the southern U.S. through the weekend. A heat wave over the Southwest U.S. will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Multiple rounds of thunderstorms will produce heavy to excessive rainfall with significant flash flooding across portions of southern New England. Read More >

Hazardous Weather Conditions

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fair

91°F

33°C

Humidity 46%
Wind Speed SE 9 mph
Barometer 29.86 in
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index95°F (35°C)
Last update 29 Jul 8:35 pm CDT
Extended Forecast for

Howe TX

Heat Advisory July 29, 08:50pm until July 30, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 29, 08:50pm until July 30, 08:00pm

    NOW until 8:00pm Thu

    Heat Advisory

  • Tonight

    Low: 78 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny and hot, with a high near 100. Heat index values as high as 105. South wind 5 to 10 mph.

    High: 100 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 79. South wind around 10 mph.

    Low: 79 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny and hot, with a high near 101. Heat index values as high as 107. Southwest wind around 10 mph.

    High: 101 °F

    Hot

  • Friday Night

    Friday Night: Partly cloudy, with a low around 78. South southwest wind 5 to 10 mph becoming north northwest after midnight.

    Low: 78 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 94. North wind 10 to 15 mph.

    High: 94 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 72. North northeast wind 5 to 15 mph.

    Low: 72 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 92. North northeast wind 5 to 10 mph.

    High: 92 °F

    Sunny

Detailed Forecast

Tonight
Partly cloudy, with a low around 78. South southeast wind around 5 mph.
Thursday
Sunny and hot, with a high near 100. Heat index values as high as 105. South wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 79. South wind around 10 mph.
Friday
Mostly sunny and hot, with a high near 101. Heat index values as high as 107. Southwest wind around 10 mph.
Friday Night
Partly cloudy, with a low around 78. South southwest wind 5 to 10 mph becoming north northwest after midnight.
Saturday
Sunny, with a high near 94. North wind 10 to 15 mph.
Saturday Night
Mostly clear, with a low around 72. North northeast wind 5 to 15 mph.
Sunday
Sunny, with a high near 92. North northeast wind 5 to 10 mph.
Sunday Night
Clear, with a low around 72. East northeast wind 5 to 10 mph.
Monday
Sunny, with a high near 94.
Monday Night
Mostly clear, with a low around 75.
Tuesday
Sunny, with a high near 97.
Tuesday Night
Mostly clear, with a low around 76.
Wednesday
Sunny, with a high near 97.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Howe TX
 33.5°N 96.63°W (Elev. 814 ft)
Last Update:
6:12 pm CDT Jul 29, 2026
Forecast Valid:
8pm CDT Jul 29, 2026-6pm CDT Aug 5, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation