Well, that part of the continent is always cold in the winter. People who were born there are used to it or at least more used to it than an average Miami guy.
Some things to remember if you decide to move out there:
At that temperature, never wear metal frame glasses because when temperatures are that low, the metal will stick to your skin and can rip it.
You must have all parts of your body covered because you could lose your fingers to frost bite. If you buy one of those North Face coats, it will not work because the material will crack at those temperatures. Traditionally, reindeer skin boots and coats are better and will protect you. But I believe now, there is new technology of synthetic material coats that will not crack. Maybe if you wear an astronaut suit. Kidding aside, you need a better quality coat than the typical North Face.
In those cultures, eating frozen meat is normal. People are used to eating frozen reindeer meat. I mean after all, ice is their life.
When you are out in those temperatures and spit, by the time your spit hits the ground, it's ice.
It can get cold too in the USA in northern Minnesota at -20 degrees or more but not on the level of parts of Siberia.
I will say this. The human body is amazing and can adapt to extremes. We can do it. Even if we have to eat frozen meat and dress like a reindeer.