Do they have snow in december?

Yes they do but it is hard to predict when and there can be anywhere from a dusting to a couple of inches. But normally goes away pretty quick.

Sometimes not a lot of the time.

We leave New Orleans for Mardi gras. Every year. Usually In March and February we get snow 80% of the time , so I think it's just luck. You never can tell. If you drive up the mountain you should see some on the ground.