100 degrees in the summer in AZ is a cool day. I was even in TX this summer in Dallas and it was 98 deg at 7 pm with the sun down and it was cool compared to FL and 90 deg and 80+% humidity. AZ has lower humidity then TX. AZ gets hot when you start getting over 105 deg.
I think I played golf in FL recently and the temp was about 92 or 93 deg but with the humidity it was 110+. I had a pull cart not a covered motoroized cart.
Its lke that here in the Keys, woke up this morning at 3:30 it ws 85, humidity up there as well over 70 all the time.