You sometimes probably wonder why your electricity bill goes up and down, and is higher at certain times of the year. If you’re paying close attention, you may have noticed that the spikes generally occur during the warm summer months and cold winter months. That’s because your heating and cooling system is working harder during these months to keep the inside of your home comfortable. Typically our highest energy use periods of the year will occur in June through September and then again in January and February. When there is a larger difference between the outside air temperature and the temperature you have the inside of your home set at, you use more energy to maintain the comfortable setting you like.