*As of Jul 6, 8 PM local time.*
Current Conditions and Heat
McKinney is experiencing very hot conditions this evening. The air temperature is currently 91F, but the heat index makes it feel like 97F. This significant discrepancy is driven by high humidity levels.
The relative humidity stands at 49%, with a dew point of 70F, creating a muggy atmosphere that traps heat close to the ground. Winds are currently calm at 0 mph, with only light gusts reaching 4 mph, offering little relief from the warmth. The sky remains clear, allowing the day's heat to persist into the night.
Forecast for Tonight and Tomorrow
Temperatures will remain elevated through the night. The low is expected to settle near 75F, though temperatures may rise slightly to around 77F during the overnight hours. Heat index values could climb as high as 99F. Winds will remain light, shifting to east southeast at 0 to 5 mph. The sky will stay mostly clear.
Tomorrow brings continued heat with a high near 95F. The heat index is forecast to reach as high as 102F, indicating dangerous levels of heat stress for prolonged exposure. The day will begin sunny, but conditions will change later.
A chance of showers and thunderstorms is expected after 1pm. The chance of precipitation is listed at 30%, with southeast winds holding steady at 0 to 5 mph. Temperatures will drop to a low near 76F tomorrow night, with heat index values around 99F.
