I guess I'm in the minority by voting for Hot Temps. Specifically, it's the heat/humidity that gets me. I'm a sweaty bastard (if I play a round in 34-degree weather I'm usually out of my sweatshirt and in just my t-shirt by hole 5 or 6), and it doesn't help that a majority of the tournaments I've played are in July/August, by far the worst months for humidity in WI. I can't play well when I'm sweating profusely and having to wipe my sweaty palms after every shot, have salty sweat burning my eyes, having my glasses slide around, etc.
I've been playing in HUGE gusty winds for the last week and haven't been too adversely affected...in fact, I threw one of my longest drives on a hole INTO a headwind yesterday (still went OB, but bested all my previous drives on that hole by AT LEAST 50'). I like playing the wind and trying to figure it out...it's especially rewarding when you correctly predict how a 40 MPH sustained gust will affect your 40' birdie putt, and you just loft your putter up like you're shooting a 5-footer, and the wind grabs your putter and SLAMS it into the chains! Of course, there are more missed putts from that range in the wind than made...
If there's excessive mud/flooding, I just won't play those holes.