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

Extreme Heat Across the Southern U.S.; Flash Flooding Threats in the Mid-Atlantic, Northeast, and Four Corners Region

Dangerous and extreme heat will remain across portions of the southern U.S. this week. Heavy rainfall may bring significant flash flooding across portions of the Mid-Atlantic and Northeast through the night, and additional flash flooding concerns across New England on Wednesday. Monsoonal thunderstorms will bring a flash flood risk to the Four Corners region, especially in burn scar areas Read More >

Hazardous Weather Conditions

Current conditions at

McKinney - McKinney National Airport (KTKI)

Lat: 33.18°NLon: 96.59°WElev: 584ft.

Fair

79°F

26°C

Humidity 82%
Wind Speed S 3 mph
Barometer 29.85 in (1010.0 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 29 Jul 3:53 am CDT
Extended Forecast for

Mc Kinney TX

Heat Advisory July 29, 04:08am until July 29, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 29, 04:08am until July 29, 08:00pm

    NOW until 8:00pm Wed

    Heat Advisory

  • Today

    High: 101 °F

    Hot

  • Tonight

    Tonight: Partly cloudy, with a low around 81. South southeast wind 5 to 10 mph.

    Low: 81 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny and hot, with a high near 102. Heat index values as high as 110. South wind 5 to 10 mph.

    High: 102 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 82. Southeast wind 5 to 10 mph.

    Low: 82 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 104. Southwest wind around 10 mph.

    High: 104 °F

    Hot

  • Friday Night

    Friday Night: Partly cloudy, with a low around 82. South southwest wind around 5 mph.

    Low: 82 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny and hot, with a high near 99. North wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 99 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 75. North northeast wind 5 to 15 mph.

    Low: 75 °F

    Mostly Clear

Detailed Forecast

Today
Mostly sunny and hot, with a high near 101. Heat index values as high as 109. South southeast wind 5 to 10 mph.
Tonight
Partly cloudy, with a low around 81. South southeast wind 5 to 10 mph.
Thursday
Mostly sunny and hot, with a high near 102. Heat index values as high as 110. South wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 82. Southeast wind 5 to 10 mph.
Friday
Sunny and hot, with a high near 104. Southwest wind around 10 mph.
Friday Night
Partly cloudy, with a low around 82. South southwest wind around 5 mph.
Saturday
Sunny and hot, with a high near 99. North wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday Night
Mostly clear, with a low around 75. North northeast wind 5 to 15 mph.
Sunday
Sunny, with a high near 97. North northeast wind 5 to 10 mph.
Sunday Night
Clear, with a low around 75.
Monday
Sunny, with a high near 98.
Monday Night
Mostly clear, with a low around 77.
Tuesday
Sunny and hot, with a high near 99.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mc Kinney TX
 33.19°N 96.65°W (Elev. 545 ft)
Last Update:
1:26 am CDT Jul 29, 2026
Forecast Valid:
4am CDT Jul 29, 2026-6pm CDT Aug 4, 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