Brr... It's cold... We usually manage to warm up nicely under the covers, though! And the humans put on plenty of clothes when we go out (I've got furs, thankyouverymuch). It's around -20C (that's -4F) outside right now.
This is the inside of the door when we were up by the lake around new years - the lock cylinder got so cold it got all frost covered on the inside! It was nice and warm inside, though. We're heading back up today and Mom's obsessing with covering up the kitties a bit, doesn't want them to freeze. Good thing Virus has grown such a nice coat lately.