That's as hot as a person can really tolerate.
There's large chunks of the world proving that false every day. For the geographically impared, the simple fact that Phoenix has existed for longer than air conditioning, proves that statement false.
And 0F as the low point is equally as useless.
Hypothermia can be a problem in temperatures as high as 50F. 0F is a meaningless number, outside of purely subjective "it's cold" uses.