When I moved into my first apartment it was in the Spring. My water, electric, and heating bills were low and manageable since the apartment didn't have air conditioning.
That changed drastically during the Winter. My natural gas bill in particular jumped to crazy high proportions even though my roommate and I wore layers and kept the thermostat at a reasonable temperature. Of course the first time we had a storm and the windows shook because they had so many air leaks you could see daylight through parts of the window and frame, we realized that our heating money was literally going out the windows.
Welcome to paying bills as an adult. High heating bills in the winter, high electric and water bills in the summer (if you have air conditioning and a garden.)
I learned my lesson and after some research, learned how to lower my water, gas, and electric bills for the year with a phone call.