Attached Link: http://www.digi-element.com/wb/worldbuilder4cam/rainsnow/rainsnow.mov

I stand corrected, it seems WorldBuilder has a good solution to weather FX using particles which can interact with environment objects, etc. in large scenes. I'm not a WorldBuilder user, so I'm not pushing the product, but the link above is to a video tutorial on how they do it, and it seems Vue Pro should be more than capable of this as well.

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Tools :  3dsmax 2015, Daz Studio 4.6, PoserPro 2012, Blender v2.74

System: Pentium QuadCore i7, under Win 8, GeForce GTX 780 / 2GB GPU.