The distribution of the Sun's energy on Earth changes throughout the year due primarily to the angle of inclination or tilt of the Earth relative to its axis. Combining this tilt with the mid-latitude location of the Great Lakes dictates large differences in the amount of incoming solar energy seasonally, constituting a major control over the weather and climate in the region. Earth's curvature creates a steep temperature gradient at these latitudes, both at the surface and aloft, contributing to interesting weather extremes in every season in the Great Lakes.

Slide the fader to see the four seasons of the Great Lakes Region as observed by NASA polar orbiting satellites.