Yep, in the southeastern US it's routinely so cold inside that were it to get that cold in the winter, they would turn up the heat. Except that instead of wearing three layers of clothing you're in shorts and a T-shirt because it's 95F/35C+ and 100% humidity outside.
I don't think I'll ever get used to this. I don't see how it's possible even in principle to acclimate to such large swings in temperature over such a short time frame.