Hamsters usually only hibernate for a few days at a time. If kept in very cold conditions, they may hibernate for up to a week. Hamsters only hibernate in captivity if exposed to cold, dark conditions. Exposing a hibernating hamster to warmth or touch can help revive them.
Hamsters can revive and then resume hibernation over the span of 12 hours. Owners who desire their hamster to revive and not resume hibernation can place the hamster in a warm location with plenty of food, which should induce the hamster to remain awake. Hamsters kept at temperatures above 60 degrees Fahrenheit with at least 12 hours of light per day and plenty of food rarely hibernate.