I grew up in the great white north (most of my time was in north central North Dakota, with time in Alaska and Utah). When I moved to Phoenix, I didn't wear anything heavier than a flannel shirt all winter and use to smile at people wearing coats and carrying blankets to the Coyotes' games. We even went swimming in March in an unheated pool (roommate at the time was a friend from school who grew up in Chicago).

Not any more. If it is below 75F or so, I'm putting on sweatshirts or a light jacket. My parents claim I turned into a thermal wimp (they retired to Omaha).