One of the highlights of our previous holidays have been the disney water parks. Our son would of been happy to spend the entire duration of our 3 week holiday at either blizzard beach or typhoon lagoon. Having always gone to Florida in July/August the water parks have always been a fantastic way to recharge the batteries (and top up the tan). This year we are going in December. Can anyone tell me if the water parks are open in December and is it chilly.