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5-day forecast / McKinney, TX

MondayMostly Sunny80° / 60° 1%
TuesdayMostly Sunny82° / 61° 1%
WednesdayMostly Sunny82° / 64° 6%
ThursdayMostly Sunny82° / 63° 13%
FridayChance Rain Showers75° / 62° 40%

McKinney Under Extreme Heat Warning as Temperatures Near 105 - Aug 20, 6 AM

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

An Extreme Heat Warning is active for McKinney. Current conditions show 81F, with a high near 105F expected today. Heat index values may reach 111F. Stay hydrated and limit midday exertion.

Cody Esparza· AI-assisted, edited by Jake Team

August 20, 20262 min read

National Weather Service radar for North Texas (KFWS)

*As of Aug 20, 6 AM local time.*

Severe Heat Warning in Effect

An Extreme Heat Warning is currently active for the McKinney area, issued by the National Weather Service in Fort Worth. This severe alert indicates dangerous heat conditions are expected to persist. Residents should take immediate precautions to protect their health and safety during this period of intense warmth.

Current Conditions and Today's Outlook

It is currently Thursday morning in McKinney. The air temperature stands at 81 degrees Fahrenheit, with a feels-like temperature of 83 degrees. Relative humidity is at 66 percent, and the dew point is 68 degrees. Winds are blowing from the south southwest at 8 miles per hour, with gusts reaching 11 miles per hour. The sky is clear.

Today will be sunny with a high near 105 degrees and a low near 82 degrees. The chance of precipitation is low at 14 percent. Heat index values are expected to reach as high as 111 degrees.

Winds will shift to the south southwest at speeds between 5 and 10 miles per hour. Tonight, conditions will remain mostly clear with a low around 82 degrees, though temperatures may rise to around 84 degrees overnight. Winds will be from the south southwest at around 10 miles per hour.

Tomorrow's Forecast and Safety

Tomorrow will also be sunny, with a high near 105 degrees and a low near 81 degrees. There is a slight chance of showers and thunderstorms after 1 p.m., with a precipitation chance of 22 percent. Heat index values could reach 112 degrees. Winds will be light from the south southwest at around 5 miles per hour.

Given the severe heat, it is crucial to stay hydrated and limit outdoor exertion during the hottest parts of the day. Check on neighbors and vulnerable individuals to ensure they have access to cooling and water. Avoid leaving pets or children in unattended vehicles. Monitor official channels for updates on the weather alert status.

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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