How warm is your room getting? During the summer, my "snake room" (aka extra bedroom) gets up into the low 80s. I don't cool it off other than the ceiling fan and house a/c. They do just fine. So long as your room isn't getting above 82 or so (an hour or two up to 85 is OK) or getting below 65, they will be just fine.
Keep in mind these guys don't get perfect temperatures in the wild, so a little variance isn't going to hurt them one bit. Now don't get me wrong, you must be mindful of temps, but a little fluctuation one way or the other just isn't a big deal.