The only things I would be worried about also is facing the dog house so the wind isn't coming in the door (or that there's room for him to lay away from the door) and that his water doesn't freeze over. I've never kept a dog outside, but I know there are many that do. Especially if he's used to being outside, it wouldn't be as huge of a shock to his body. Do you have a garage that you could put a run inside of? That's the only other thing I can think of.
Wrath of Grim z Dragon
"Mr. Grim"- Threaten my handler. I dare you.