The snake winter barely bothers
Corn snakes are temperate North American snakes built for real winters, and a healthy pet corn snake takes the season calmly. Hold the warm spot near eighty-five degrees on its thermostat and allow the far end to run much cooler, and the snake will use the gradient exactly as he does in June. He may cruise a little more on dark afternoons and his appetite may soften slightly, but most corn snakes eat, shed and explore right through the season. Winter care for this species is less about adding heat than about not fixing what isn't broken.
You can skip brumation entirely
Breeders cool corn snakes over winter to condition them for spring breeding, and care sheets written for breeders sometimes make it sound compulsory. For a pet, it isn't. Cooling a snake who has food in his gut, or who is anything less than in perfect condition, adds risk and buys a pet owner nothing. If yours slows down a little on his own, that mild seasonal dip is fine; deliberately refrigerating a healthy pet is not part of his care. Keep the lights on a natural day length, keep feeding while he is keen, and let winter be uneventful.
Dry air and the stuck shed
The season's one reliable nuisance is humidity. Heated rooms run dry, corn snakes shed more poorly in dry air, and the evidence is a shed that comes off in rags instead of one clean stocking. Give him a humid hide — a lidded box with a snake-sized hole, lined with damp moss or paper towel — and he will use it in the run-up to every shed. Afterwards, check the shed skin itself: the tail tip and both eye caps should be there. A retained tail tip can strangle the tail over successive sheds, and retained eye caps are not a home-remedy item — both earn a vet's or experienced keeper's help, starting with a lukewarm soak rather than any pulling.
Feeding, weight and the great escape
Keep offering meals on his usual rhythm while he is eating well, and weigh him every month or so; a corn snake in good condition is muscular and rounded, not triangular and not sausage-round. Winter is also peak escape season in many houses — a restless snake, a lid left unclipped after a quick check, a gap that appears as plastic tubs flex in cold rooms. Test the lid and latches as part of the winter routine; a loose corn snake in a heated house usually survives, but weeks lost in a wall cavity is a poor winter for everyone. When a shed comes away in pieces or a meal pattern vanishes, put a follow-up question to KinsLe's Kimmy; she answers using the KinsLe Answers library.