tucson: Hi, im just wondering since it's quite hot here in Arizona, and i don't know what is the right temperature of our house during the summer. Some people say that too much heat will ruin our appliances. Right now our thermostat is set to 75F, and the AC is almost non-stop. Thanks|||75 isn't bad, we keep ours at 68 at night and 70 to 75 during the day. I've never hear that things will go bad or whatever, not unless you keep your appliances outside. Any way enjoy Arizona. Watch out for crazy drivers, not kidding.|||Well what I would say is not too hot to where you cant stand it and then not too cold. Whatever feels good to you.|||75 F is the norm|||79 F|||69F. Because Arizona is soooooooo hot during summer and if you kept the house nice and cool during those long hot summer months then you can beat the heat.