It's a fairly light month, with a New York Islanders scrimmage, five concerts, and two comedy shows on one night--plus four tours, which are small events.
July 2014 was a little busier, but only because there were multiple Walking with Dinosaurs and Cirque du Soleil shows.
August 2015 event calendar
In August, there will be two concerts, a boxing night, an unspecified "private event", and two days of pro wrestling, plus two days of wrestling load-in.
August 2014 was somewhat busier, because of the circus and Marvel Live.
The September 2015 calendar, as of now, is pretty thin, but includes three concerts and three NHL pre-season games, a sign of how the arrival of the Islanders might fill seats.
The September 2014 event calendar--at least as released--was pretty thin, as well, with five concerts, one hockey game, and two community events.