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5-day forecast / McKinney, TX

WednesdaySunny83° / 65° 7%
ThursdayPartly Sunny83° / 65° 2%
FridaySlight Chance Rain Showers75° / 60° 23%
SaturdayChance Showers And Thunderstorms77° / 59° 48%
SundayPartly Sunny80° / 63° 8%

McKinney Under Extreme Heat Warning as Temperatures Soar to 102F - Jul 22, 12 PM

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

An Extreme Heat Warning is in effect for McKinney, TX, with heat index values reaching 114F today. Residents face dangerous conditions alongside an active Air Quality Alert.

Cody Esparza· AI-assisted, edited by Jake Team

July 22, 20262 min read

National Weather Service radar for North Texas (KFWS)

*As of Jul 22, 12 PM local time.*

Dangerous Heat and Active Alerts

McKinney, TX, is currently under an Extreme Heat Warning, signaling severe and dangerous heat conditions for the area. The National Weather Service in Fort Worth has issued this alert to highlight the significant risk posed by the current weather pattern. In addition to the warning, a Heat Advisory remains in effect, further emphasizing the need for caution as temperatures climb.

An Air Quality Alert is also active, compounding the health risks associated with the current atmospheric conditions.

Current conditions show an air temperature of 99F, but the combination of heat and humidity makes it feel like 110F. The relative humidity is at 45%, with a dew point of 73F, creating a muggy atmosphere. Winds are blowing from the northeast at 8 mph, with gusts reaching 10 mph, while the sky remains clear.

Forecast for Today and Tomorrow

Today, McKinney will experience sunny skies with a high near 102F. The National Weather Service forecasts heat index values as high as 114, making it feel significantly hotter than the actual air temperature. Northeast winds will range from 5 to 10 mph.

The chance of precipitation is minimal at 2%, with a low near 77F expected tonight. Overnight, temperatures will rise to around 79F, with heat index values reaching 109. East northeast winds will continue at 5 to 10 mph.

Tomorrow, the heat will persist but with a slight dip in the high temperature, which will be near 98F. Sunny skies are expected again, with heat index values peaking at 105. East winds will blow at 5 to 10 mph.

The chance of rain is just 1%. Temperatures will drop to a low near 77F, rising to around 79F overnight, with heat index values up to 103. The sky will become mostly clear tomorrow night.

Safety Reminders

Given the Extreme Heat Warning and high heat index values, it is critical to stay hydrated and limit midday exertion. Seek air-conditioned environments during the hottest parts of the day. Check on neighbors, especially the elderly and those without reliable cooling. Due to the active Air Quality Alert, individuals with respiratory issues should monitor their symptoms and limit outdoor activity if advised.

National Weather Service radar for North Texas (KFWS)

Sources

National Weather Service radar

National Weather Service forecast data

Open-Meteo weather data

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Cody Esparza· AI-assisted, edited by Jake Team

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

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