I hatched chicks in October. Long story. Since it is getting below freezing at night I am keeping them indoors.
We are fortunate to have a partially finished apartment in a shop building across from our house. We have them in a prefab coop that has a fair amount of run space. The coop is in the bedroom space of the apartment.
They are doing well but getting big. I think they are all cockerels and so plan a bachelor flock area when the weather is better in Spring. Or maybe sooner if they are too crowded.
I wouldn’t hatch or acquire chicks this late again. It’s just too cold. We’ve had snow already.
First, I have never hatched chicks. So take my story just as my own experience, not as advice.
Background, my breeder has a flock raiser service that I use. He will raise the chicks I buy from him until they can survive outdoors which means fully feathered. He raises them in his unheated basement. I have gotten spring birds and fall birds from him. Spring birds are easy because I enjoy warmer weather! I can bring them home at 5 weeks. I only need to be concerned about rain if I put the introduction cage in the run. They start laying eggs just at the time when days get short. Often they continue to lay a bit longer but eventually between 8 birds total I was getting 1-2 eggs a day till spring.
Fall birds are a bit harder because I hate the snow, and this year snow happened early! The first time I raised birds hatched October 1st I brought them home the Monday before Thanksgiving, 8 weeks old. We didn't get snow for several weeks. They were too young to lay eggs yet. By spring they were laying and I had eggs straight through till the days grew short again. I had used the short days to let them mature rather than have them reach maturity just as the days shortened.
This year I repeated my original purchase. Hatched in October, brought home the Monday before Thanksgiving. This time I have a big enough coop to set the cage up inside rather than in the run. They are doing well. I'm hating dragging water to swap with frozen water. (The adults have a heated waterer in the run. I'm not running power to a temporary cage, so I schlep water back and forth. Ugh.) I am looking forward to lots n lots of eggs come spring!
In either case the temperature hasn't been a problem. Properly conditioned October babies can survive very well in the coop by November. If not conditioned they won't do well when the cold weather gets serious. I'm thankful for my breeder doing such a good job conditioning my chicks.
So it's really just a personal choice albeit contingent on whether you are prepared to properly condition your chicks in the fall in order to start getting lots of eggs by spring, or do you prefer getting outside with your new birds in spring and waiting longer for eggs. I like both methods.
By the way, I do not heat my coop.