Even though it was dry and ungodly hot, I will miss summer - especially the whole "casualness" of it. I can count on one hand the number of times I wore shoes this summer (except for cycling shoes). Just an old pair of sandals, if anything. Light summerfare dinners on the patio with white wine, fireflies, etc... - "...and the living is easy."
Also, all the sweating I did on rides helped me shed 14 pounds - feel fitter than ever.
What will you miss?