Pros recommend setting your AC between 72°F and 78°F when home and raising it about 7°F when away. At night, you can bump the temp up by 4°F or rely on cooler outdoor air and fans to stay comfortable.
In summer, most people set the thermostat to between 72°F to 78°F to ensure the home is comfortable. However, if the temperature is set too low, then the air conditioner may operate for long periods ...