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

96°F

36°C

Humidity 32%
Wind Speed E 5 mph
Barometer 30.06 in (1017.0 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index97°F (36°C)
Last update 28 Aug 12:53 pm CDT
Extended Forecast for

Allen TXSimilar City Names

  • This Afternoon

    This Afternoon: Sunny and hot, with a high near 100. Heat index values as high as 103. East wind 5 to 10 mph.

    High: 100 °F

    Hot

  • Tonight

    Tonight: Clear, with a low around 77. East wind 5 to 10 mph.

    Low: 77 °F

    Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 101. Heat index values as high as 106. East southeast wind around 5 mph becoming south southwest in the afternoon.

    High: 101 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 79. South southeast wind 5 to 10 mph.

    Low: 79 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 101. South wind 5 to 10 mph.

    High: 101 °F

    Hot

  • Sunday Night

    Sunday Night: Clear, with a low around 79. South southeast wind around 10 mph.

    Low: 79 °F

    Clear

  • Monday

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

    High: 100 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 79. Southeast wind around 10 mph.

    Low: 79 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 99. South wind 5 to 10 mph.

    High: 99 °F

    Hot

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 100. Heat index values as high as 103. East wind 5 to 10 mph.
Tonight
Clear, with a low around 77. East wind 5 to 10 mph.
Saturday
Sunny and hot, with a high near 101. Heat index values as high as 106. East southeast wind around 5 mph becoming south southwest in the afternoon.
Saturday Night
Mostly clear, with a low around 79. South southeast wind 5 to 10 mph.
Sunday
Sunny and hot, with a high near 101. South wind 5 to 10 mph.
Sunday Night
Clear, with a low around 79. South southeast wind around 10 mph.
Monday
Sunny and hot, with a high near 100. South wind 5 to 10 mph.
Monday Night
Mostly clear, with a low around 79. Southeast wind around 10 mph.
Tuesday
Sunny and hot, with a high near 99. South wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 78.
Wednesday
Sunny and hot, with a high near 99.
Wednesday Night
Mostly clear, with a low around 79.
Thursday
Sunny and hot, with a high near 100.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Allen TXSimilar City Names
 33.12°N 96.67°W (Elev. 653 ft)
Last Update:
1:26 pm CDT Aug 28, 2026
Forecast Valid:
1pm CDT Aug 28, 2026-6pm CDT Sep 3, 2026
 
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