Opening the window, even just a little bit, before you go to bed will change the air temperature of the room. But will it help you sleep better?

A good night's sleep, with no waking up in the middle of the night, can be best achieved at a temperature of between 60u00b0F and 67u00b0F, according to experts.

Does that seem to cold? As you sleep, your core body temperature decreases by as much as 3u00b0F between the hours of midnight and 4 a.m. This natural process is called thermoregulation.

So, opening your window on a cool night could help you sleep better, and give your air conditioner a break. Just make sure it's not too humid outside.