My wife and I went last year in the first week of December and the daytime weather was really nice (to me, my wife thought it was a little chilly). At night though, it was very cool.
As soon as the sun set, you could feel the difference right away.
We talked to a local and they said that the weather was unseasonably cool for the 1st week of December. We did wish we had packed some warmer clothes.
We are going again this year , the same week, and you can bet we will pack sweatshirts!!!
The BEST thing about going there then was the crowds, or should I say lack of crowds.
Hardly any waiting, especially if you use fastpass.
If you've never been there at Christmas time, check out the Very Merry Xmas party.
We really enjoyed that.
Have fun!
John and Donna