Dan, that's another big difference between us. For most of my life, I liked the fresh air and liked having windows open, but we haven't had a window open in at least a month and a half and don't expect to have any weather to open a window until after Labor Day at the earliest.
But my wife and I and the dog go in and out so often that we ought to have a revolving door, so we do let some fresh air in.
We don't mess with the thermostat all summer. It's a programmable one, but we just leave it the same 24/7. And you may have guessed, it's 71 degrees in here, and I'd sure hate for it to get above 73.

I don't know how you measure your temperature in the house, but our thermostat is set on 78. In other words, it's that far off because by leaving it on 78 all summer, my real thermometer shows 71 plus or minus one degree.
We kept our daughter's two Maltese dogs this past weekend and took them home Sunday afternoon just before our daughter got home. I didn't have a good thermometer with me, but the minute we walked in that house, my wife said something about it being terribly hot in there. I found that my daughter had turned off the air-conditioning, so I simply turned it on. I didn't mess with her thermostat setting, but it showed to be set to 80 and was actually 83 in the house. And yep, that was certainly not dangerously hot, but sure was uncomfortably hot.