I live in Florida. During the hot summers sometimes the birds sleep outside on top of the rain/shade tables in my pens even though the coops have plenty of ventilation. I don't worry about them because my pens are covered for protection from aerial predators. Usually when the weather cools off they will go into their coops onto their roosts. I leave the coops pops doors open so they can go in and out at will. All of my coops have night lights too. As long as your coop and run are predator proof they are ok. Good luck and have fun...