I don’t know, New York in August makes it pretty unpleasant to wear a suit. Actually it’s unpleasant just to try and breathe... it’s like huffing hummus. Of course Florida in August is downright fatal. I think fashion just doesn’t care.
As Neal Stephenson has observed, the three-piece wool suit makes perfect sense if you're in a place where the year-round temperature is a constant 50 degrees F, indoors and out.
Basically, the British Isles before modern central heating, and nowhere else.