Claiming an average highs and lows is a poor measure of actual temperature. I would agree Royals can manage low 70s for a few days with not too many issues and as hot as 100ºF for short periods of time too. Look at the seasonal average temps not the average of the hottest and coolest days. Like you not understanding humidity this too demonstrates a poor understanding. Your arguments are sound but based upon the average of the very hottest and coolest temps of a given location.
It is like me saying the average temperature in Tampa florida for April is 63ºF. It is the average low not the average. they represent the average of the lowest recorded temps not the normal temps at all. The average normal temp is closer to 73ºF, 10 degrees different from the average of the lowest temps.
http://www.weather.com/weather/tenda...+USFL0481:1:US