Your windows are meant to form a barrier between the indoors and outdoors while still allowing in natural sunlight and providing you with a view of the outdoors. If they're letting in not only light, but also cold air, then they're not doing their job properly.
Sadly, window leaks and drafts are common in Indianapolis homes. They appear when some types of windows start to age, causing your energy bills to creep up and your home to feel uncomfortably chilly. Luckily, you have several options for dealing with drafty, leaky windows.