I'm going to pinpoint my location since others will answer for the state.....come to Disney World from October to April but do NOT come the week before Thanksgiving, during Easter vacation or the week before and two weeks after Christmas. For the best weather and lowest crowds choose the first two weeks in December. Every inch of the resort is decorated for Christmas and you can walk right into any exhibit, attraction, ride, etc.
No, I don't work there but I do live in Mickey's back yard :-)