This was my first year/winter of commuting and I made it! On the worst nights it would take 1.25 hours or a little more (warm weather about an hour) for my 12.5 mile commute coming home at 4:00 am. I learned that it is not as bad as many think, coldest temp was 7deg F windchill -7 deg F. When dressed right it is no problem.

Merino wool baselayers/socks, Woolrich bibs, glove liners inside XL mittens, Gore Phantom outer shell, balaclava, wool hat, NEO'S overboots over winter boots, studded tires, allow a little extra time, go a little longer route if paths haven't been plowed yet to avoid pushing your bike through deep snow, BE EXTRA CAREFUL!