Wacky Climate

So yesterday I woke up to go to class and left home at 7:30 am. It was 58 degrees. I was cold. Naturally. (I swear I'm cold blooded). I wore shoes, long pants, and a sweatshirt. I got out of class at 10 and went to the math lab (as usual) until about 1. When I left the building at 1 pm it was 98 degrees. That's a swing of 40 degrees in 6 hours people! Can someone tell me how they are able to dress for such weather? Honestly. HONESTLY.