Setting your thermostat during the summer. Generally, our bodies are most comfortable when the air inside of our home is within a degree of two of a steady 75 degrees F during the hot, summer months. This temperature setting, however, is only necessary when your house is occupied during waking hours.hen you’re awake and at home during the colder months of the year, your furnace will keep you comfortably warm at about 68 degrees. Just as during the summer, you can save money on your heating bills by lowering your thermostat a few degrees at eight-hour intervals – either while you’re at work or are asleep.