I sometimes wore skirts where I used to work (business casual dress code) and some female employees wore skirts as well. I mostly wear skirts for special occasions, and for job interviews I always wear them. In hotter weather, I prefer bermudas or capri pants though.
In high school, many girls wore skirts in the summer, though I recall those longer, layered skirts to be more popular. Don't know how it is now. Depends on the person and where you live though -- my sister tends to wear skirts (layered ones) in the summer, while I don't.
I've seen some
women wear skirts in the winter. I don't know how they do it.