I would think that you might be able to hang the bike from the ceiling in the garage. If not, I would put it outside with the caveats above in mind. The tires might not be helped with Spring freeze/thaw cycles. You might go so far as to remove the tires/tubes. I'd probably wrap it in plastic. Whatever benefit might accrue from being able to "breathe" is probably less helpful than simply keeping bugs, dust and dirt from getting in and around the bike. The cold isn't going to be any issue but keeping your car outside during an Alaskan Winter is crazy. (I'm an Alaskan too)