Indeed...the summers in the southern hemisphere are warmer than the north. People have always asked why Austrialia isn't like North America concerning climate. In the winter here in USA the earth is a little closer by 1.18% A.U give or take a couple hundred thousand miles. Raising the mean temperture by something like 8 degrees in the south. Meteroligist explain that if the mean temperture of Florida were 1.5 degrees less, they would have 50% chance of snow in higher elevations (500 feet is the highest I believe). Also looking into Ice ages may pertain to orbital and axis shifting in the earths' history. Quite interesting really.