Hi--On 5/22/12 I moved my 4-wk. olds to the coop and kept them inside it for 5 days. When I opened the pop hole on 5/27, they were the cutest things slowly peering outside and then slowly but surely came marching down the ramp. They love the ouside. Best part is that by keeping them inside to learn their new home before letting them outside, they have gone inside at dark all by themselves every night. I live in south Alabama and our temps are very similar. You should have no problem. Good luck and good chicken keeping.