But you can't compare November to December lol, the average temperatures are radically different. Also, average temperatures are just a smoothed out mean for the whole month and meaningless for extremes on individual days which are still possible. It's an apples to oranges comparison.
Was 15-16 our only 40/40 winter? I seem to recall there was another one here.
Also 11-12 was a horrendous winter, that one day might have been the only decent snowfall that entire winter.