Mahonri... I had millie eggs and silkie eggs on the counter for 2 weeks... decided I wasn't going to set them, so I put them in the fridge. A week later, someone asked for silkies, so I decided to test them out and added the 3 week old refrigerated eggs to the incubator alongside the fresh eggs... all hatched but one! LOL!
A friend in OK (where it typically is above 100F in the summer) says he stores all his hatching eggs in the fridge.