I'm an avid Hellsing cosplayer, as is my wife. Though as many has pointed out, they're not really outfits for warm climates. Three layers of fabric is murder when it's hot; take it from someone who cosplayed Alucard in San Fran last year. At least the hat shaded me from the worst of it.
~Forget world peace. Visualize using your turn signal.~
"Don't engage in a battle of wits with an unarmed man." (Crawford, courtesy of Aoe, in this case)