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

Dangerous Heat over the South-Central and Southwest U.S. Through Next Week

Dangerous heat persists across the Desert Southwest through this weekend and across the Southern Plains and Lower Mississippi Valley through at least the middle of next week. Numerous daily record high temperatures are expected through at least Tuesday for much of Texas and Oklahoma as well as portions of Louisiana, New Mexico, and Arizona. Read More >

Hazardous Weather Conditions

Current conditions at

McKinney - McKinney National Airport (KTKI)

Lat: 33.18°NLon: 96.59°WElev: 584ft.

Partly Cloudy

86°F

30°C

Humidity 46%
Wind Speed Calm
Barometer 29.96 in (1013.6 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 23 Aug 12:53 am CDT
Extended Forecast for

2 Miles SW Collin County Regional Airport TX

Extreme Heat Warning August 23, 12:00pm until August 23, 09:00pm
Click here for hazard details and duration
Extreme Heat Warning

  • Overnight

    Overnight: A 20 percent chance of showers and thunderstorms before 4am. Mostly cloudy, with a low around 81. Calm wind becoming east southeast around 5 mph.

    Low: 81 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: Sunny and hot, with a high near 106. East southeast wind 5 to 10 mph becoming south southwest in the morning.

    High: 106 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 82. South southeast wind 5 to 10 mph.

    Low: 82 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny and hot, with a high near 107. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 107 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 82. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 82 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 106. Southwest wind around 10 mph, with gusts as high as 20 mph.

    High: 106 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 81. South wind 5 to 10 mph.

    Low: 81 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 100. West wind around 10 mph.

    High: 100 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 78. North wind around 5 mph becoming calm in the evening.

    Low: 78 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms before 4am. Mostly cloudy, with a low around 81. Calm wind becoming east southeast around 5 mph.
Sunday
Sunny and hot, with a high near 106. East southeast wind 5 to 10 mph becoming south southwest in the morning.
Sunday Night
Mostly clear, with a low around 82. South southeast wind 5 to 10 mph.
Monday
Mostly sunny and hot, with a high near 107. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear, with a low around 82. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday
Sunny and hot, with a high near 106. Southwest wind around 10 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 81. South wind 5 to 10 mph.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 100. West wind around 10 mph.
Wednesday Night
Partly cloudy, with a low around 78. North wind around 5 mph becoming calm in the evening.
Thursday
Sunny and hot, with a high near 101.
Thursday Night
Partly cloudy, with a low around 77.
Friday
Sunny and hot, with a high near 101.
Friday Night
Mostly clear, with a low around 78.
Saturday
Sunny and hot, with a high near 101.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Collin County Regional Airport TX
 33.17°N 96.62°W (Elev. 541 ft)
Last Update:
1:42 am CDT Aug 23, 2026
Forecast Valid:
1am CDT Aug 23, 2026-6pm CDT Aug 29, 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