Well
Here in the lower Hudson Valley, it is currently 31°F - although it is supposed to go down below zero tonight.
My daughter lives in Chicago and, this morning, she had to walk for about six blocks from the El down to the Field Museum where she works with a temperature of -15° and a wind chill of whatever (The Field is right on the lake and there is no cover for several blocks above it).
She was frozen.
Go Northwestern!