My hands went numb inside my "boxing" mittens inside my car when I went to deliver my rent check perhaps half an hour into sunset last night. I forgot to check the outdoor temp before I left the house, as I had just gotten up. (Yes, I'm a lazy ass good-for-nothing welfare queen.) (But I'm working on producing jewelry & patchwork stuff!)
At any rate, the heater ran virtually all night. I just turned it down from 74 degrees because it was clearly a hopeless task. Checked the National Weather Service site just now and found it is -6 degrees fahrenheit. 21 degrees below zero with the windchill. At that point, there's scarcely any difference between Celsius and Fahrenheit.
The weather has been cold enough to actually induce me to bathe.