In my experience it has snowed at the Osbourne Family Lights at MGM. Also the town of Celebration (if you have a car or can get over there) has snow nightly right out by the main resturants worth the trip if you can get there...the dining is good and they close off the street to make it look like it really has snowed lots of suds and "snop" (since it is really soap bubbles). The kids love it...
Here is the info about the snow at Celebratrion in case you are interested:
November 25 -December 31
6:00 p.m. - 10:00 p.m.
Now Snowing Nightly
Snow falls on MARKET STREET at 6, 7, 8 & 9 p.m.
Photos with Santa
Pet Photos with Santa on Wednesday evenings
Strolling Holiday Carolers and Holiday Entertainment