Where I live its near impossible.
The temp have been below -40 for a while now. Even when its gets nice (-25) the wind chill brings it down to -45 anyway. And snow is up to you knees or waist in places.
Anyway, I have been out twice since November only for a loop around the block.
There really is no winter cycling here.
But in April when the morning temps are -15 or so I will be riding again.