A couple of weeks ago it was -3f and I was still wearing shorts and t-shirt and sandals. Everyone here in MN looks at me like I am completely off of my rocker sometimes.. even my wife. She thinks I am nuts when I get so hot that I roll the window down in the car at times. She is SO SO happy to have dual climate in the car hehe.
and yes I REALLY do wear t-shirt, sandals and shorts during the winter.