Turns out there's a magic number for your thermostat setting in the winter, experts say. Sixty eight degrees is ideal. But if you're looking for a ballpark, anywhere around 70 degrees is a good target ...

The temperature hit minus 80 degrees at Prospect Creek Camp, Alaska, on Jan. 23, 1971, which is located north of Fairbanks.

The National Weather Service has warned that bitterly cold wind chills could result in hypothermia or frostbite.