I wiil be in xian from 21st dec 15 until after christmas..is there going to be many tourists then?

No, there won’t be many tourists at that time, for it is in travel slack season now. According to the weather forecast, it may snow lighly on Dec. 22. Maybe you be able to see snow.

Well, to see plentiful snow, you may go to the Bailuyuan Ski Resort. It is a very popular resort, but has more man-made snow. Anyway, you can still have much fun there.