Is it hilly region or high altitude . Because anything around or above -30c is Siberian type climate
It is mainly forest land around my place and although I live on a hill, it isn't particularly hilly in the area. But we are located in the north central part of the US and subject to what is referred to as the "Siberian Express" which is when the jet stream dips down into the central part of the country and lets all the cold air from northern Canada into the area. The coldest I remember is about -50F, but further it got enough colder. A person can actually throw a hot cup of coffee into the air and it will freeze before it hits the ground.
Or you can use a banana to pound a spike into a board. Fortunately it isn't always this cold and has actually been fairly mild the last couple of years.
I doubt my survival in those conditions.
It takes a bit of getting use to, but the body does adapt.