The Case of the Disappearing Bike Lanes
One challenge to expect when cycling in the winter, is that bicycle lanes tend to "disappear" - either under snow banks, or under cars that take over the bike lane when snow covers their parking spots.
For those who live in areas with well-developed cycling infrastructure, this change can be especially difficult: Accustomed to traveling almost exclusively via bike lanes, having to now cycle directly with car traffic can be a bewildering experience. That is one reason I think it is important to get comfortable with "vehicular cycling" even if it does not seem like you need it. Once the snow arrives, there is no way to tell what part of your journey will have the familiar bike lanes available and what part will dump you directly into the traffic lane.