Ugh! We can't decide on what to do...Last year we were at WDW, and had days in the 80's, then a day that was in the 50's and I have to say, it was the coldest I had ever been! The wind was colder in Florida, than in Chicago I swear! My kids are really worried about it being too cold to do anything, but I keep telling them Florida is the same way - up and down. I thought Nov. would be better than Dec. in Cali, but it sounds like it is the same either way - all over the board! I will show these posts to the kids and see what they think. We REALLY want to see WOC, but I am not standing out there if it is 30 degrees! I stay inside when it's that cold - even in Chicago!!!
I know it's tough to decide.

For me, I prefer colder weather. As jemilah said, cold feels Christmasy. In fact, I hate heat, so I wish it were 30 degrees all day long during my upcoming DLR trip but it's very unlikely that it will be. I was so annoyed when it was hot during my December trip last year, and very warm in November too.
Okay, so last year I got the super-warm temperatures in November and December, as I've said.
In 2009 (December), it was 75-ish degrees in the daytime and in the 50's at night. I was not cold. Other people might be cold. Sure, it was a little 'brisk', but I walked around in a t-shirt the whole time and never bothered with my coat. Even at 11 p.m., I had no coat on. It seemed like a comfortable chill, not a harsh type of cold.
But, in 2008 (December), I had on a light hoodie-type jacket. On the first day it was in the 50's. Second day, it was in the 60's in the daytime and in the low 40's at night. I will admit - even with my jacket on, and even with my love of colder weather - I was fuh-ree-zing when the sun went down!!! Brrrr! I mean, my teeth were chattering, my hands were numb, I was chilled to the bones...all I wanted was to get back to the room and get my coat, but it wasn't convenient to do it at that moment, so I shivered all night long. However, the next night I was prepared - I had a big, bulky coat, a wool neck scarf, mittens, the whole thing, and I was wearing a heavy sweater. And then on my last day it started raining so I had to drag out the umbrella.
2007 (December) was pretty cold at night too. It was probably in the low 70's in the daytime and in the 50's at night.
It was many years ago when I was at
Disneyland over Thanksgiving weekend and it poured heavy rain. Heavy, like monsoonal, rain.
It was even longer ago than that when I was at DLR in December, and it was in the 40's in the daytime

scared1

and in the low, low 30's at night - and it was cooooooold. I loved it!

But it was cold. We actually had to seek out earmuffs because we couldn't get warm enough. We wore layers over layers, wool caps, gloves, the whole nine yards. At that rate, it may as well have been snowing!
Good luck! Let us know what you decide to do.