Our thermostat is set at 72 all year! If it goes below that, especially if it was 61 in the house, I would put the heat on, just to take the chill off!
We're still around 90 here in Florida during the day now. The early morning has been in the 70's -- NICE! Can't wait for the cooler weather. I love the crisp air, but probably have to wait until November/December for that!