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5-day forecast / McKinney, TX

FridaySlight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms97° / 77° 25%
SaturdaySunny100° / 77° 4%
SundaySunny99° / 77° 2%
MondaySunny99° / 78° 1%
TuesdaySunny99° / 77° 2%

McKinney Faces Extreme Heat Warning with Highs Near 105 - Aug 21, 2 PM

McKinney weather, updated every four hours — local forecasts you can trust.

An Extreme Heat Warning is active for McKinney. Current temperatures are 93F, with a high near 105F expected today. An Air Quality Alert is also in effect.

Cody Esparza

August 21, 20262 min read

National Weather Service radar for North Texas (KFWS)

*As of Aug 21, 2 PM local time.*

Severe Heat Warning in Effect

McKinney residents are currently under an Extreme Heat Warning issued by the National Weather Service. This severe alert remains active until 8:00 PM CDT on August 22. Additionally, an Air Quality Alert has been issued, prompting caution for those sensitive to air conditions. The combination of intense heat and potential air quality issues requires careful planning for outdoor activities.

Current Conditions and Today's Outlook

It is currently Friday afternoon, with the air temperature sitting at 93 degrees Fahrenheit. The heat index makes it feel like 96 degrees. Relative humidity is at 41 percent, and the dew point is 66 degrees.

Winds are blowing from the south at 8 miles per hour, with gusts reaching the same speed. The sky is clear. Today’s high is expected to reach near 105 degrees, with a low near 81 degrees.

There is a 13 percent chance of precipitation, with a slight chance of showers and thunderstorms before 4 PM. Heat index values could reach as high as 109 degrees. Tonight will be partly cloudy with a low around 81 degrees, though temperatures may rise to around 83 degrees overnight.

Heat index values could reach 107 degrees.

Tomorrow's Forecast and Safety

Tomorrow will bring a high near 106 degrees and a low near 81 degrees. The sky will be mostly sunny, with a slight chance of showers and thunderstorms after 4 PM. The chance of precipitation is 14 percent.

Heat index values may reach 108 degrees. Winds will continue from the south at 5 to 10 miles per hour. Given the extreme heat, it is crucial to stay hydrated and limit midday exertion.

Check on neighbors, especially the elderly or those without air conditioning, to ensure their safety during this prolonged heat event.

National Weather Service radar for North Texas (KFWS)

Sources

https://radar.weather.gov

https://api.weather.gov

https://open-meteo.com

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Cody Esparza

Cody Esparza covers McKinney city hall, the council, and county government.

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