I enjoy riding in fresh snow, up to a couple inches, where cars haven't driven yet. Once cars have been on a road, especially if it hasn't been plowed, it gets difficult. Most of the roads I ride get plowed pretty soon, so it's not a big deal for me, but there is a half mile or so that is difficult for a couple days after the snow. And that's not more than a few days in a whole winter.

I don't expect that information is of any use to you, of course.

I would suggest you plan to ride all winter, and make the appropriate preparations to do just that; and then make the decision on a day to day basis. I can't predict how it will go for you; but that's no reason to give up yet! I have no trouble biking throughout the winter, though by March I will be pretty tired of it.