The ideal temperature for your home depends on your personal preferences and the season. During the winter, the Department of Energy recommends setting the thermostat at around 68°F or lower each day when the home is empty, or at night when you are sleeping. According to ENERGY STAR, the magic number for your winter thermostat setting is 68 degrees Fahrenheit when youre at home. To achieve optimal comfort, it is recommended for homeowners to set their thermostats between 68 to 72 degrees while there are people inside of the home. Typically, during the day in the winter, the most optimal comfort temperature is 72 degrees Fahrenheit. Gradually turning the air down during the day can help you save energy. For example, if you set your thermostat at 72 in the morning, midday it should be 68, and when you go to sleep, it should be down to 66. Lowering your temperature by 1-3% in the winter can save you money on your heating bill.