I like to keep it about 75F in the summer and 65F in the winter. The Ladies will go on the screened-in back porch to sleep, play and watch the wildlife in temps of 20F to 105F.
Paraphrasing @neely "If it is comfortable for you, it should be comfortable for your cats"
Paraphrasing @neely "If it is comfortable for you, it should be comfortable for your cats"