We have been there the 2nd to last week in January and think that is one of the best times to go. We never, never had to use fastpass. As a matter of fact, we often were allowed to stay on the rides and just ride again without even getting off (ie - Space Mountain, Thunder Mountain, Rockin Rollar Coaster and most of the other popular rides). The weather did get a little chilly at times, but I would take that over hot and humid any day. Have a great time!