If it gets cold where you're at, I say "why not?"
My pea coat's not the coat I reach for when I'm going out in a suit on a cold day. But I don't suppose it'd look utterly ridiculous or anything. If you need a coat, and you don't have something more appropriate, then wear your pea coat. If you do own something more appropriate, then wear that.
I lived for several years just outside of Syracuse, NY. My winter weather street cred is solid. As in, frozen solid..... says the guy in Baltimore! Haha, this is more a conversation for the guys in Montreal and Winnipeg