Getting Winter in X-Plane is possiblee, there exist several methods, each more or less involving. One of the simplest is JMGE mod.
I present you: X-Plane 11 Alpes in the snow:
Taking off from Grenoble Le Versoud: (airport trees are not converted):
Turning my nose to the high mountains. Lets hope the weather does not degrade:
Looking back direction Grenoble:
Steep valleys
Destination in view:
Lining up
Touch down
Parked, ready to sky: