Wow, lot's of comments. Are you really reading them? Either 25 or 26, usually 25 and a fan. I sleep old style with a cover sheet and light blanket (quilt type, very light). Fan goes off, I wake up... A/C is always on... If I breath through my nose (ie not stuff or partially stuffed up) I have no drying in my mouth. If I can't breath through my nose, then yes, usually my mouth gets dry.