For a typical workday, set your AC temperature when away about 5°F to 7°F above your usual setting. Start with a smaller change if pets are home or humidity is a concern.
Essential Concepts
Raise the setting for longer absences; consider pets and humidity.
Related posts: Programmable thermostats (https://www.energy.gov/energysaver/programmable-thermostats) and air conditioning (https://www.energy.gov/energysaver/air-conditioning).