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5-day forecast / McKinney, TX

FridaySlight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms97° / 77° 25%
SaturdaySunny100° / 77° 4%
SundaySunny99° / 77° 2%
MondaySunny99° / 78° 1%
TuesdaySunny99° / 77° 2%

McKinney Under Extreme Heat Warning as Temperatures Hold Near 105 - Aug 18, 5 PM

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

An Extreme Heat Warning is active for McKinney. Current conditions show 102F air temperature with a feels-like of 105F. Sunny skies and low humidity persist through tomorrow.

Cody Esparza

August 18, 20262 min read

National Weather Service radar for North Texas (KFWS)

*As of Aug 18, 5 PM local time.*

Severe Heat Alert 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 remains in effect until the evening of tomorrow. Residents should be aware that dangerous heat conditions are present right now.

The air temperature is currently 102F, but the heat index makes it feel like 105F. Relative humidity is low at 28%, and the dew point sits at 63F. Winds are blowing from the south at 13 mph, with gusts reaching the same speed.

The sky is clear, offering no relief from the intense solar radiation.

Today and Tonight Outlook

Today’s forecast indicates sunny conditions with a high near 105F. The heat index values are expected to reach as high as 108F. South winds will average around 10 mph.

The chance of precipitation is minimal at 1%. As night falls, skies will remain clear. Temperatures will drop to a low near 81F, though they may rise slightly to around 84F overnight.

The heat index will remain high, reaching up to 106F. South winds will slow to between 5 and 10 mph. This pattern of intense heat and dry air continues into tomorrow.

Tomorrow’s Forecast and Safety

Tomorrow will mirror today’s conditions, with sunny skies and a high near 105F. The heat index is again expected to peak at 108F. Winds will shift to a south-southwest direction, ranging from 5 to 10 mph.

The chance of rain is 0%. Overnight, skies will be mostly clear with lows near 81F, potentially rising to 84F. The heat index will reach 107F.

Given the sustained high temperatures and low humidity, it is critical to stay hydrated and limit outdoor exertion during the hottest parts of the day. Check on elderly neighbors and those without access to air conditioning. Avoid leaving pets or children in parked vehicles, as temperatures can rise rapidly in enclosed spaces.

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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