While it may be tempting to save some money by turning off your A/C, it’s not recommended. In fact, it could end up costing you more money by creating problems around the house. What the A/C temp should be when on vacation depends on how long you expect to be gone from the house.
If you’re only going to be gone for a few days, it’s best to keep your HVAC around the same temperature you normally keep it at. For longer stints, you can go ahead and set your thermostat anywhere between 85-90 degrees according to the Department of Energy. This should run your air conditioner enough to remove excess humidity and keep other parts of your home safe.