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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Hazardous Weather Conditions

Current conditions at

McKinney - McKinney National Airport (KTKI)

Lat: 33.18°NLon: 96.59°WElev: 584ft.

Fair

80°F

27°C

Humidity 71%
Wind Speed Calm
Barometer 30.07 in (1017.5 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 28 Aug 8:53 am CDT
Extended Forecast for

Wylie TX

  • Today

    Today: Sunny and hot, with a high near 99. East northeast wind around 5 mph.

    High: 99 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 76. East northeast wind around 5 mph.

    Low: 76 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 99. Southeast wind around 5 mph.

    High: 99 °F

    Hot

  • Saturday Night

    Saturday Night: Clear, with a low around 77. Southeast wind 5 to 10 mph.

    Low: 77 °F

    Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 99. South wind around 10 mph.

    High: 99 °F

    Hot

  • Sunday Night

    Sunday Night: Clear, with a low around 77. South southeast wind 10 to 15 mph.

    Low: 77 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 98. South wind around 10 mph.

    High: 98 °F

    Sunny

  • Monday Night

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

    Low: 78 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 97. South wind around 10 mph.

    High: 97 °F

    Sunny

Detailed Forecast

Today
Sunny and hot, with a high near 99. East northeast wind around 5 mph.
Tonight
Mostly clear, with a low around 76. East northeast wind around 5 mph.
Saturday
Sunny and hot, with a high near 99. Southeast wind around 5 mph.
Saturday Night
Clear, with a low around 77. Southeast wind 5 to 10 mph.
Sunday
Sunny and hot, with a high near 99. South wind around 10 mph.
Sunday Night
Clear, with a low around 77. South southeast wind 10 to 15 mph.
Monday
Sunny, with a high near 98. South wind around 10 mph.
Monday Night
Mostly clear, with a low around 78. South southeast wind 5 to 10 mph.
Tuesday
Sunny, with a high near 97. South wind around 10 mph.
Tuesday Night
Mostly clear, with a low around 78.
Wednesday
Sunny, with a high near 98.
Wednesday Night
Clear, with a low around 78.
Thursday
Sunny and hot, with a high near 99.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Wylie TX
 33.05°N 96.54°W (Elev. 499 ft)
Last Update:
6:06 am CDT Aug 28, 2026
Forecast Valid:
9am CDT Aug 28, 2026-6pm CDT Sep 3, 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