So it's a little after 1 AM in Chicago. I have the window open but it feels stuffy in here. Can't sleep. It's 68F (20 degrees Celsius), but the humidity is 85% according to the NOAA Web site. There is a bit of a breeze, but my windows face south so I don't feel it moving through the open window. Guess I will run the air conditioner for awhile to try and dehumidify a bit. I'd prefer to have the window open, though.