Last year the 29th,30th and into Dec was COLD!! I don't know about the days before but I would keep an eye on the forecast and pack accordingly. We needed sweatshirts and more! We will be there the 14-23rd this year so we are planning on warm weather!Hope you have a great time!
Depends on the park. The Magic Kingdom is dolled up by at least the first Christmas party in the first week of November. It's really a matter of how quickly they can turn around from Halloween decorations to Christmas. Epcot doesn't officially start it's Christmas season until the day after Thanksgiving but if you're going a week before, you may see some preparations. I believe DHS is kind of in between MK and Epcot but you'll see the Osbourne Family Spectacle of Dancing Lights up by as early as August. They won't be turned on, but the process is a long one. On the week before Thanksgiving, you can probabley expect resorts to be in the process of decorating if not finishedDo the Christmas decorations go up before Thanksgiving?
We're thinking of going the week before Thanksgiving and although I love Christmas - we've done Disney in December before and it felt a little like Christmas overload to me!