He's complaining about 10 below zero (F). That's -23 C.
Heck, Mrs. BD and I have skiied at 10 below. Definitely brisk and exhilarating. I recall that I had a big old Ford Bronco at the time, and it was not too eager to get running but it did after coughing a bit. The skiing was just fine (short lift lines) but the chair lift, in the wind, was brutal. That was Vermont.