The ideal temperature to set your air conditioner during summer is 78 degrees Fahrenheit, according to the U.S. Department of Energy (DOE) . However, this is just a base point to start from and only applies while you’re at home and awake. If you find that 78 degrees Fahrenheit is too warm for you, you can slowly start adjusting your thermostat by one degree at a time until you arrive at the perfect comfort level. The recommended temperature range for summer air conditioning is between 72°F to 78°F. The ideal temperature for sleeping in summer is between 60°F and 67°F. When you’re away, the temperature should be set no lower than 85°F. The average air conditioning temperature depends on various factors, including geographic location, comfort levels, season, and cost.