Another reason warm weather schools aren’t the answer: hurricanes!
My D graduated from U of South Carolina in May. Classes were cancelled at least one day every year (and an entire week when she was a freshman) because of hurricanes / heavy rains. The school is well inland, but is in the path of evacuees from the coastal communities. In fact, the direction of travel on some major highways is “flipped” so vehicles can only drive away from the coast during hurricane conditions. I was annoyed at first (“I’m paying for those classes!”), until I realized that a few cancelled classes is nothing compared to ensuring safety.
She did cut winter break short one year to avoid a snowstorm up north (we’re from PA and her roommate, who was driving, is from CT). I doubt that we would have paid more than a token amount to change the ticket, which supports @garland’s advice to save your allowed absences for a good reason.