I've never been the first part of Dec., but would love to go. I have been twice in Oct. The first time was in '95 and it was GREAT!! The last time was last Oct and it was hotter than I thought it would be (also our first trip with kids, which made a difference, I'm sure.) I think Dec. would be great because of the decorations. I don't know about the weather, though. We were there in Jan. and were surprised at how COLD it was. We needed jackets everyday, even during the hottest part of the day, except our last day. Hope this helps.