I didn't have issues with my incubator while hatching in the winter.... just try to time it, so that by 8 to 10 weeks it won't be TO cold outside. I brood in the house so they would be in there 8 weeks regardless of winter or spring or summer.... They usually stay in the house longer if I brood in winter so I do smaller batches and then when I do put them outside in the grow out coop I put their heat plate in there with them for warmth when needed that I don't usually do with spring/summer chicks. We tend to bond even more with winter chicks because there are fewer and they are in there longer. We love learning their personalities and watching chick tv.