It just occurred to me that the initial outbreak, and thus most of the walkers we see, started during the summer. We consistently see Rick and the gang suffering through the intense Georgia heat, sweating and sweltering away. And yet, the vast majority of zombies we see are all in long sleeve shirts, long pants, full length dresses, jackets, coats, and even sweaters. What gives?
And yes, I realize that it's mostly a cheat so the makeup people don't have to zombify more than the dozens of heads and pairs of hands they have to in any given day. Still, I find it strange that most of the undead in the show are dressed for a pleasant autumn or spring thaw rather than the typical 90+ degrees we saw portrayed in the first two seasons.