We are planning our first Christmas season trip to WDW. We have never been when the decorations are up. We can go either 11/15 - 11/21 or 12/6 - 12/12. From my research, crowd levels will be relatively low either time. One factor we are looking at is if all Christmas decorations at all parks will be up at both times. I have another thread where I have asked that question. What I would like to address in this thread is the weather. I have read that the weather can vary greatly in December. How is it generally during mid-November?