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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 Faces Extreme Heat Warning and Air Quality Alert - Jul 22, 8 AM

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

An Extreme Heat Warning and Heat Advisory are in effect for McKinney, TX, with temperatures soaring near 102F and heat index values reaching 114F. An Air Quality Alert is also active.

Cody Esparza

July 22, 20262 min read

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

*As of Jul 22, 8 AM local time.*

Current Conditions and Alerts

McKinney, TX, is currently under a significant weather watch as an Extreme Heat Warning and a Heat Advisory remain active. The National Weather Service in Fort Worth has issued these alerts due to dangerously high temperatures and oppressive humidity. Additionally, an Air Quality Alert is in effect, adding another layer of concern for residents.

Right now, the air temperature stands at 82F, but the heat index makes it feel like 89F. The relative humidity is at 79%, with a dew point of 75F, creating a muggy atmosphere. Winds are currently calm at 0 mph, though gusts may reach up to 12 mph. The sky remains clear overhead.

Forecast for Today and Tomorrow

Today, the sun will be out with no rain expected, as the chance of precipitation is just 2%. The high will reach near 102F. According to the National Weather Service, heat index values will climb as high as 114.

Northeast winds will blow between 5 to 10 mph. Temperatures will drop to a low near 77F tonight. The sky will stay clear, but the heat will linger, with heat index values as high as 109.

Overnight, temperatures may rise slightly to around 79F. East northeast winds will continue at 5 to 10 mph.

Tomorrow, conditions will remain sunny with a high near 98F. The chance of precipitation is minimal at 1%. Heat index values are expected to peak around 105.

East winds will persist at 5 to 10 mph. Temperatures will fall to a low near 77F tomorrow night, with skies becoming mostly clear. Overnight lows may rise to around 79F, with heat index values up to 103.

East southeast winds will blow at 5 to 10 mph.

Safety Reminders

Given the Extreme Heat Warning and Heat Advisory, it is critical to stay hydrated and limit time spent outdoors, especially during the hottest parts of the day. Check on neighbors and vulnerable individuals who may be at risk from the heat. Due to the Air Quality Alert, consider reducing prolonged outdoor exertion to protect respiratory health.

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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