For everyone that is wondering about what to pack, let me set your mind at ease...
You won't know what to pack until the 10 day forecast before your trip.
I'm sorry. But I have been to WDW in December a few times. 1 time, there was frost on the ground when we went to the bus stop 1st thing in the morning. 1 time, I had to keep 2 replacement shirts in my backpack for when I'd sweat thru the previous shirt. 1 time it rained like it did in the summer months. And 1 time it was JUUUUUSSSSSSTTTT right.
The best advice I can give, if the temperature will fluctuate on the days that you visit, brings a hockey jersey. They act as wind breakers when it's windy, keep the heat in when it's chilly, light enough that it's not too hot when it's warm, and easy enough to take off and stow in a pack it is too warm. Plus, wearing a team from your area is always a conversation starter with people in line.
In an off topic moment, I was just clicking around today and found the Disney Food Blogs on
youtube.
THIS is the ranking of Magic Kingdom eateries.