Hello!

That's an awesome question. In Paris during Christmas time, Parisian women stroll the streets in short dresses and skirts with tights/colons underneath. It looks gorgeous with their beautiful coats and boots.

Skirts are considered a huge part of fall and winter fashion especially during holiday season. Some skirts are made of thick materials or wool and for some women the tights underneath is enough to keep them warm, so it depends on their tolerance to the weather. Also in a lot of countries, all indoors areas are heated during the winter so they only get to experience the cold as they move from one place to another.