Was below zero, windy, and snowing in my neck of the woods today. One of the most fun commutes I've had in awhile. FWIW, soft shell jacket with two compression shirts under is plenty warm in the upper body in even these conditions. Gotta worry about the extremities, though. Winter boots,wool socks, wool long underwear, wool gloves under mittens, and balaclava with goggles.....comfy riding in the snow!
Enjoy the cooler weather rides!