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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 Climb to 100F Tomorrow - Jul 19, 4 AM

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

McKinney faces rising temperatures and sticky conditions. Highs near 97F today and 100F tomorrow bring heat index values up to 106F.

Cody Esparza

July 19, 20261 min read

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

*As of Jul 19, 4 AM local time.*

Current Conditions and Humidity

It is currently Sunday overnight in McKinney, TX, and the air remains quite humid. The current air temperature is 79F, but the feels-like temperature is 82F due to the moisture in the air. Relative humidity sits at 84%, with a dew point of 73F. Winds are light at 6 mph with gusts up to 12 mph, and the sky is clear.

Today and Tonight Forecast

Today will be sunny with a high near 97F. The low will drop to near 77F. There is a 14% chance of precipitation. According to the National Weather Service, heat index values will reach as high as 104F. Winds will be from the south southwest at 5 to 10 mph.

Tonight, conditions will be mostly clear. Temperatures will fall to a low around 79F, with readings rising to around 81F later in the night. The heat index will remain elevated, reaching as high as 102F. South winds will persist at 5 to 10 mph.

Tomorrow Outlook

Tomorrow will also be sunny, with a high near 100F. The low will be near 80F. The chance of precipitation drops to just 2%.

Heat index values are expected to climb as high as 106F. Winds will shift to the southwest at around 5 mph. Tomorrow night will be clear, with a low around 80F and temperatures rising to around 82F overnight.

South southwest winds will be around 5 mph.

Safety Reminder

With temperatures and heat index values climbing significantly, it is crucial to stay hydrated and limit midday exertion. Check on neighbors, especially the elderly and those without air conditioning, to ensure they are safe in the heat. No active weather alerts are in effect, but the intense heat requires caution.

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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