I live in a condo. My building is between two other buildings.
Here's cold and dry. Sometimes breathing burns my nose.
On top of that, the sun comes and sets to the oposite of my windows, so every year, all the year there's no direct sunshine in my apartment.
This winter is just as cold as all the past winters.
Is so cold here in my apartment, that you can literally leave raw food outside the fridge and it won't go bad.
It's so cold here in my apartment, that I have to wear socks, shoes, hoodie or sweater and a hat.
It's so cold here in my apartment, that going outside feels warmer.
It's probably °5C (°40F) maybe even less than that...