My recommendation is to get your humidor into the coolest part of your house. Not sure if you live in an area of the country where houses have basements but if so basements are ideal. If your basement has a musty smell, don't keep it there though since your cigars can potentially pick up the musty odor over time.
If you don't have a basement, make sure your humidor is out of the sunlight. North side of the house is cooler than the south. Closets or storage areas are good options. I used to have a humidor that I kept in a dresser drawer. It generally stayed 1-2* coooler than the temperature of the room.
Rupe