Okay, if you go here:
you'll see an article about global warming, where it says that temperatures are the warmest in over four hundred years. It also states that there was an unusualally cold period called the little ice age which lasted through most of the late milleniumn.
Hence, so what? what is the proper normal temperature for the earth, the long, extreme winters the world suffered during the 14th-19th centuries, or now and the midevil warmspell?
Do you really want snow in September?