Just spend 5 nights at a 5* hotel in So of France, only costing $550+ per night, and because it was October and it was unseasonably warm ( or because they're close to Italy where a/c only works from June 1 - Sept 30).....the target temp they were shooting [officially] for in the rooms was 22C...about 72 F. Had to be warmer than that but there was no actual thermometer readings in the room. Windows could open, but it was way too noisy and humid to do that.
Awful sleeping in that kind of environment.