Where do all the blondes go?

Now that summer has ended it seems that all the blonde haired ladies have gone into hibernation. One of the most remarkerable changes in nature is the quick appearance and disappearance of blondes.

When summer and the warm weather show up so do the blondes. Like a bat outta hell they come rolling into town seemingly from out of nowhere. As fast as they come in, when the warm weather disappears so do they. Where are all the blondes hiding?
-He