We have always gone to WDW in June, but now we are planning our first trip to the World in December. I'm used to the heat and the crowds, carrying a water bottle, and taking mid-day breaks to swim. What is the weather like in December? We'll be there the 20th- 23rd (short trip, but we want to be home on Christmas day). Do we wear shorts, pants, jackets? Does is rain? I just don't know what to expect. And what are the crowds like that time of year? Thanks for your help.