Nudity is definitetly related to weather. Since moving to Brisbane Australia we have literally become semi-nudists, only properly clothing ourselves to go out. It's just too hot for clothes at home. Nudity can be a distraction however so a sarong is usually the ensemble dujour. Unfortunately mine are mostly see-through so I have to remember that in apartment living you can't just duck down to the garage without getting properly dressed.
Sorry if this seems insensitive given the cold that most of you are living through, but too hot can be just as bad as too cold. Not that I've ever been too terribly cold.