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5-day forecast / McKinney, TX

TuesdaySunny102° / 80°
WednesdaySunny101° / 81° 1%
ThursdayMostly Sunny101° / 81° 2%
FridayMostly Sunny103° / 82° 6%
SaturdaySunny100° / 76° 7%

McKinney Heat Advisory in Effect as Temperatures Climb Near 100 - Jul 23, 8 AM

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

A Heat Advisory is active for McKinney, TX, with heat index values reaching up to 109 degrees. Current conditions are warm and humid, with clear skies and light winds.

Cody Esparza

July 23, 20262 min read

National Weather Service radar for North Texas (KFWS)
National Weather Service radar for North Texas (KFWS)

*As of Jul 23, 8 AM local time.*

Current Conditions and Alert Overview

A Heat Advisory is currently in effect for McKinney, Texas, signaling moderate severity and expected urgency. This alert remains active until July 23 at 8:00PM CDT, as issued by the National Weather Service in Fort Worth. Residents should be aware that the combination of high temperatures and humidity will create dangerous heat index values, requiring caution during the advisory period.

As of this Thursday morning, the air temperature stands at 75F, with a feels-like temperature of 76F. The relative humidity is at 78%, and the dew point is recorded at 68F. Winds are blowing from the east at 7 mph, with gusts reaching up to 16 mph. The sky remains clear, setting the stage for the intense heat expected later in the day.

Forecast for Today and Tomorrow

Today, McKinney will experience sunny skies with a high near 98F. The low will drop to around 79F tonight. The chance of precipitation is minimal at just 1%.

According to the National Weather Service, heat index values will climb as high as 106 today. East winds will persist at 5 to 15 mph. Tonight, skies will become mostly clear with a low around 79F.

Heat index values will remain elevated, reaching up to 105. Winds will shift slightly to east southeast, maintaining speeds of 5 to 15 mph.

Tomorrow, the heat will continue with mostly sunny skies and a high near 97F. The low will be around 80F. There is no chance of precipitation, listed at 0%.

The heat index is forecast to peak at 109, making it feel significantly hotter than the actual air temperature. South southeast winds will increase to 10 to 15 mph. Overnight into tomorrow night, temperatures will rise to around 82 before settling back to a low of 80.

Heat index values will stay high at 105, with south winds continuing at 10 to 15 mph.

Safety Reminders

Given the active Heat Advisory and forecasted heat indices exceeding 105 degrees, it is crucial to stay hydrated and limit midday exertion. Seek air-conditioned environments during the peak heat hours. Check on elderly neighbors and those without reliable cooling.

Wear lightweight, light-colored clothing and use sunscreen if you must be outdoors. Remember that heat-related illnesses can develop quickly, so monitor yourself and others for signs of heat exhaustion or heat stroke.

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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