The hotter it is outside, the more hot air you’ll have to remove from your house. It doesn’t take as much energy to cool a room to 72 degrees on a 77-degree day as it does to get cool on a 95-degree day. You can mitigate how much you spend by turning your thermostat up on the hottest days. You’ll still feel cooler inside than you would outdoors, but your portable air conditioning or window AC unit won’t have to work so hard. You can also help your air conditioner do its job by making sure your space is well insulated and by closing blinds and curtains to block out bright sunshine.
