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

Heavy Rainfall and Severe Thunderstorm Threats; Heat Risk Expands; Monitoring the Tropics

Flash flooding risks continue for portions of the Four Corners and Great Basin through today. Severe thunderstorms are outlooked from the eastern Great Lakes, southern New England into the mid-Atlantic through Tuesday. Heat risk increases and expands across the center of the nation and across the Ohio Valley and mid-Atlantic this week. Continue to closely monitor tropical development in the Gulf. Read More >

Hazardous Weather Conditions

Current conditions at

McKinney - McKinney National Airport (KTKI)

Lat: 33.18°NLon: 96.59°WElev: 584ft.

Fair

100°F

38°C

Humidity 28%
Wind Speed S 8 mph
Barometer 29.95 in (1013.2 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Heat Index101°F (38°C)
Last update 31 Aug 4:53 pm CDT
Extended Forecast for

5 Miles NW Allen TX

  • Tonight

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

    Low: 79 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 99. Heat index values as high as 104. Southeast wind 5 to 10 mph.

    High: 99 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 77. South southeast wind 5 to 10 mph.

    Low: 77 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 98. Heat index values as high as 107. Southeast wind 5 to 10 mph.

    High: 98 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 78. Southeast wind 10 to 15 mph.

    Low: 78 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Thursday

    Thursday: Mostly sunny, with a high near 98. South southeast wind 10 to 15 mph.

    High: 98 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 78. South southeast wind 10 to 15 mph.

    Low: 78 °F

    Mostly Clear

  • Friday

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

    High: 99 °F

    Hot

  • Friday Night

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

    Low: 79 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 79. South southeast wind 5 to 10 mph.
Tuesday
Sunny and hot, with a high near 99. Heat index values as high as 104. Southeast wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 77. South southeast wind 5 to 10 mph.
Wednesday
Mostly sunny, with a high near 98. Heat index values as high as 107. Southeast wind 5 to 10 mph.
Wednesday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 78. Southeast wind 10 to 15 mph.
Thursday
Mostly sunny, with a high near 98. South southeast wind 10 to 15 mph.
Thursday Night
Mostly clear, with a low around 78. South southeast wind 10 to 15 mph.
Friday
Sunny and hot, with a high near 99. South wind around 10 mph.
Friday Night
Mostly clear, with a low around 79. South southeast wind 5 to 10 mph.
Saturday
Sunny and hot, with a high near 99.
Saturday Night
Mostly clear, with a low around 79.
Sunday
Sunny and hot, with a high near 100.
Sunday Night
Mostly clear, with a low around 79.
Labor Day
Sunny and hot, with a high near 100.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles NW Allen TX
 33.16°N 96.73°W (Elev. 673 ft)
Last Update:
4:21 pm CDT Aug 31, 2026
Forecast Valid:
5pm CDT Aug 31, 2026-6pm CDT Sep 7, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation