We have had some miserably hot, humid days but I usually can tolerate it with the central air set at 78-80 with ceiling fans on. I turn it up to 84 at night. About four years ago we put a window unit in our master bedroom that I can crank down to 63 at night and sleep like I love to--really cold room and heavy covers on me at night (also have the ceiling fan and a little bedside fan on). Since we started doing it this way we have cut our electric bills by a bunch! I think that the highest bill last summer was $130.