Turbo Fluff doesn't have to worry about the weather here. He is spoiled. If it is raining or too cold or too hot or there are too many raccoons around, he comes inside and I make him a nice salad! I grew up in Connecticut, however, where it can get very cold. My parents would not let my rabbits inside. They had to stay outside in the hutch. I guess they had each other to keep warm. I used to feel sorry for them and bring them in when the parents weren't home. But, after a few chewed wires (including my father's phone ... back in the days when phones had cords) and pee spots on the wood floors, the poor bunnies were exiled back to the hutch. In spite of chewing through our Christmas tree lights (and surviving) last year, Turbo maintains his luxurious indoor/outdoor life.
The people across the street have a couple of does who have built an entire system of tunnels under our block. They occasionally pop up in someone else's yard. They are out doors all the time.