The more frequently your AC cycles on and off, the more energy you use. The goal is to keep the thermostat set at a temperature that is comfortable for you, but high enough that the system doesn’t cycle on and off too frequently. If the temperatures outside continue to increase, but you are not also increasing your thermostat, and the temperature differential between the outside and inside temperatures become larger, the AC unit will cycle on more frequently and result in higher energy usage and larger electric bills. Also note that if you have a second refrigerator or freezer that is in unconditioned air (porch, garage, etc.), those units will also work harder to maintain the internal temperature while the outside temperatures continue to rise, resulting in more consumption and higher energy costs. While you might not do anything different from day-to-day or week-to-week, the outside temperatures do play a big part in your energy consumption.