I think they will do just fine. They have each other for warmth and this gets then cold hardy head on. I've had chicks outside one day old in 20 degree weather foraging with their mama all day and they did just fine and are some of my best layers now.im in Alabama so the weather is similar. I put my 2 youngest out last week in the coop at night with the adults and it was colder than it is now and they did great. I think they are ready!