I did two summers in Alabama, and gotta say that I much prefer Wisconsisota winter to Gulf Coast summer!
Sure, it gets dark - but I've got some residential hilly routes and a couple country-ish rides that are fine in the evening darkness. Cold doesn't bother me - I've been bike commuting year round for a while, and the collection of gear to prove it - as well as two bikes set up for snow and ice.
My goal this year is to keep getting in some miles and hills through the tough snowy months - December - March/April. Last year went well, though I didn't do enough climbing and fell off in February. It might be a bit miserable, but being outside in the winter has got to be better than the Exorcise Bike. And, these views...