My winter round trip is about 15km. There are only a handful of days where riding is really really tough, if not near impossible (snowstorm/freezing rain) in which case, I run instead.
As for colleagues, they have seen me on the bike since 2003. Every year, after a major snow fall, I get the same old smell. It gets even funnier when the storm starts in the middle of the work day & all the self proclaimed "leaders" are lining up reasons why they should leave earlier from work to avoid traffic & for some odd reason, the complete opposite applies to certain others that can stay later.