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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 and Humidity Persist With Sunny Skies Ahead - Jun 29, 4 AM

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

McKinney residents face high heat indices near 102 today and tonight. Conditions remain sunny with no precipitation expected through tomorrow.

Cody Esparza

June 29, 20262 min read

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

As of Jun 29, 4 AM local time.

Current Conditions and Humidity

It is currently Monday overnight in McKinney, TX, and the atmosphere remains notably humid. The air temperature is sitting at 82F, but the heat index makes it feel like 88F. Relative humidity is at 74%, with a dew point of 73F indicating significant moisture in the air. Winds are active, blowing at 17 mph with gusts reaching 25 mph, while the sky remains cloudy.

Today and Tonight Forecast

Today will be sunny with a high near 97F and a low near 78F. There is a 0% chance of precipitation. The National Weather Service indicates heat index values will reach as high as 102. South winds will range from 15 to 20 mph, with gusts as high as 30 mph.

Tonight, skies will transition to partly cloudy before becoming clear. Temperatures will drop to a low around 77F, though they may rise slightly to around 79F overnight. Heat index values will remain elevated, peaking near 100. South winds will continue at 10 to 20 mph, with gusts up to 30 mph.

Tomorrow Outlook

Tomorrow will also be sunny with a high near 96F and a low near 77F. Precipitation chances remain at 0%. Heat index values are expected to reach as high as 100.

South winds will ease slightly to 10 to 15 mph, with gusts as high as 25 mph. Tomorrow night will be clear with a low around 77F, rising to around 79F overnight. South southeast winds will persist at 10 to 15 mph, with gusts up to 25 mph.

Safety Reminder

With heat indices approaching 100 to 102 degrees, it is crucial to stay hydrated and limit midday exertion. Check on neighbors and vulnerable individuals who may be less able to cope with the heat. There are no active NWS/NOAA weather alerts at this time.

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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