I had a great winter of commuting, the best of the 4 years I've biked straight though the winter. Part of it was the lack of snow, we had a real snow-drought in the Twin Cities (especially compared to last two years that have been huge snow years). And part was getting a fatbike, making the snow we did get much easier to ride through. It also helps having biked year-over-year for a while to build experience and confidence.

Edit - I need to add temps this past winter were brutal; total of 21 rides at or below 0F and lowest temp was around -15F. (yes, I am bragging)

Here are my stats for Jan 1 to Mar 31 over the last few years:

2015 - 1,110 miles
2014 - 624 miles
2013 - 606 miles
2012 - 693 miles

These are total miles, but in the winter months almost all miles are commuting miles.