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5-day forecast / McKinney, TX

SundaySunny98° / 78° 2%
MondaySunny99° / 79° 1%
TuesdaySunny100° / 80° 1%
WednesdaySunny99° / 79°
ThursdaySunny101° / 78°

McKinney Heat and Humidity Rise This Week - Aug 9, 8 AM

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

High humidity and soaring temperatures define the forecast for McKinney, with heat indices reaching 103 today. No severe weather alerts are active.

Cody Esparza

August 9, 20261 min read

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

*As of Aug 9, 8 AM local time.*

Current Conditions

It is currently Sunday this morning in McKinney, TX, where conditions are notably humid. The air temperature stands at 81F, but the feels-like temperature is 85F due to moisture in the air. Relative humidity is at 74%, with a dew point of 72F. Winds are blowing from the south at 9 mph, with gusts reaching up to 20 mph. The sky remains clear overhead.

Today and Tonight Forecast

Today will be sunny with a high near 98F. The chance of precipitation is minimal at just 2%. Heat index values are expected to climb as high as 103.

South winds will persist between 5 to 10 mph. As tonight approaches, skies will stay clear. Temperatures will drop to a low near 78F, though they may rise slightly to around 80 overnight.

The heat index will remain elevated, reaching up to 101. South winds will continue at around 10 mph.

Tomorrow Outlook

Tomorrow promises to be sunny with a high near 99F. Precipitation chances are negligible at 1%. Heat index values could hit 102.

South winds will average around 10 mph, with gusts as high as 20 mph. Tomorrow night will also be clear, with a low around 79F. The heat index may reach 100, while south southeast winds blow at around 10 mph, with gusts up to 20 mph.

Safety Reminder

With heat indices exceeding 100 degrees, it is crucial to stay hydrated and limit midday exertion. Check on neighbors who may be vulnerable to extreme heat. While there are no active National Weather Service alerts for severe weather, the combination of high temperatures and humidity requires caution. Ensure you have access to cool environments during the peak heat hours.

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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