I've used paddling gloves for years as winter cycling gloves. Lightweight, not bulky, and they really are waterproof. Also, better workmanship than any cycle glove I've ever worn.

I don't cycle commute but do plenty of winter riding. Paddling gloves, for me, work on all but really frigid days. Once it gets into the low thirties, or below more protection is needed. But, even at those temps there are paddle glove options.