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5-day forecast / McKinney, TX

WednesdaySunny83° / 65° 7%
ThursdayPartly Sunny83° / 65° 2%
FridaySlight Chance Rain Showers75° / 60° 23%
SaturdayChance Showers And Thunderstorms77° / 59° 48%
SundayPartly Sunny80° / 63° 8%

McKinney Heat Index Nears 100°F With Slight Storm Chance - Jul 3, 4 PM

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

McKinney, TX, is experiencing very hot conditions with a current feels-like temperature of 99°F. Today brings a high near 94°F and a slight chance of showers after 4pm. Tomorrow will be even hotter, with highs near 98°F.

Cody Esparza· AI-assisted, edited by Jake Team

July 3, 20262 min read

National Weather Service radar for North Texas (KFWS)

As of Jul 3, 4 PM local time.

Current Conditions and Heat Index

McKinney, Texas, is currently under very hot conditions. The air temperature stands at 93°F, but the heat index makes it feel like 99°F. Humidity levels are notable, with a dew point of 70°F and relative humidity at 47%. The sky remains clear, and winds are blowing from the south-southeast at 10 mph, with no significant gusts reported.

Today and Tonight Forecast

Temperatures will remain elevated today, with a high near 94°F. There is a slight chance of showers and thunderstorms developing after 4pm. The chance of precipitation is listed at 16%.

Winds will continue from the south-southeast at 5 to 10 mph. As evening approaches, the heat index will remain high, with values reaching up to 100°F during the day and 99°F tonight. A slight chance of showers and thunderstorms is possible before 7pm.

Overnight, skies will be partly cloudy. Temperatures will drop to a low near 78°F, though they may rise to around 80°F later in the night. The heat index will stay near 99°F during this period.

Tomorrow Outlook

Conditions will intensify tomorrow with sunny skies and a high near 98°F. The heat index is expected to climb to 104°F. Winds will shift slightly to the south-southwest at 5 to 10 mph.

The chance of precipitation drops to 14%, with mostly sunny conditions expected. Overnight, skies will be partly cloudy, with a low around 80°F and temperatures rising to around 82°F. The heat index will remain high at 102°F.

Safety Reminder

With heat index values approaching 100°F today and exceeding 100°F tomorrow, it is crucial to stay hydrated and limit prolonged outdoor exertion, especially during the midday hours. Check on neighbors and vulnerable individuals to ensure they are safe in the heat. There are no active weather alerts, but the intense heat requires caution.

National Weather Service radar for North Texas (KFWS)

Sources

National Weather Service radar

National Weather Service forecast data

Open-Meteo weather data

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Cody Esparza· AI-assisted, edited by Jake Team

Cody Esparza covers McKinney city hall, the council, and county government.

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