I'm going to have no choice but to run a space heater during the coldest parts of winter and a small AC unit during the hottest part of the summer. It gets to be about 100 degrees F and it stays that way for a couple of months. The other thing I could do would be to freeze water in water bottles and rotate those in the cages to help keep them cool, too. I used to keep rabbits and we would do this for them when they were outside because it got so hot.