We were there Dec 2-8 and I thought it was perfect weather for being at Disney. In the mornings it was around 50, but quickly warmed up to the upper 60s, lower 70s. One day, was around 80 - we wore shorts. Because we were so busy, we didn't get to utilize the boardwalk's pool as much as we could have, but the kids actually went in at night a couple of times (outside temp was cool, but water was nice.). I will definitely be planning another trip back at that time of year! Good luck with your plans.