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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 Rise to Dangerous Levels This Week - Jul 1, 8 AM

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

McKinney, TX residents face intense heat and high humidity today with a heat index reaching 102. No severe weather alerts are active, but safety precautions are essential.

Cody Esparza

July 1, 20262 min read

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

As of Jul 1, 8 AM local time.

Current Conditions and Humidity

It is currently Wednesday this morning in McKinney, TX, and the air feels heavy with moisture. The current air temperature stands at 81F, but the heat index makes it feel like 85F. Relative humidity is sitting at 79%, with a dew point of 73F, indicating quite humid conditions that will persist through the day.

Winds are blowing from the south at 10 mph, with gusts reaching up to 22 mph. The sky remains mostly clear, allowing the sun to intensify the heat rapidly.

Today and Tonight Forecast

Today will be sunny with a high near 97F. The National Weather Service indicates heat index values as high as 102 during the afternoon hours. South winds will range from 5 to 10 mph, with gusts as high as 20 mph. The chance of precipitation is only 3%, so expect dry conditions despite the muggy air.

Tonight, skies will turn mostly clear. Temperatures will drop to a low around 78F, but the heat will linger, with temperatures rising to around 80F overnight. Heat index values will remain as high as 99. Winds will shift slightly to the south southeast, blowing at 5 to 15 mph. The humidity will keep the night from providing much relief from the daytime heat.

Tomorrow Outlook

Tomorrow will also be sunny, with a high near 96F. The heat index is expected to climb even higher, reaching values as high as 103. South southeast winds will be lighter, ranging from 5 to 10 mph.

The chance of precipitation increases slightly to 13%, but rain is not the primary concern. Temperatures will fall to a low near 77F, with overnight temperatures rising to around 79F. Heat index values will stay as high as 100.

Winds will be from the southeast at 5 to 10 mph.

Safety Reminder

With heat indices exceeding 100F, it is critical to stay hydrated and limit midday exertion. Check on elderly neighbors and ensure pets have access to cool water and shade. Avoid prolonged exposure to the sun during peak hours to prevent heat-related illnesses.

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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