I do not want to automatically say that he will not be fine outside, I suppose that he might. But there are so many dangers and not only the cold that if he could have an indoor home he would be so much better off. Outdoor cats have a much shorter life span than indoor cats. The most important thing is to have him neutered especially if he is outside or he will get all the females in the area pregnant and think of all those unwanted kitties that could be born. Also if he is not neutered and he is outside there will be fights with any neighbring males and that could be harmful to his well being, also.