I’m sure for the Texas and Arizona folks this is trivial, but here in Indiana we’re running about 100F.
Measured 144F on the deck with my heat gun, and 135F on the brick sun side of the house.
If it is 100F and humid then you have our condolences.
Your right, 100F is a mild day. But that is with about 9 percent humidity. At about 115F we start to complain...and then just go jump in the pool.
I saw that it got up to 109 in South Carolina the other day-—actual temperature, not some kind of index. That’s unreal to me.