Cycling in winter has almost no correlation to snow
Canadians were called 'wimps' in comparison with Finns in Oulu, because Canadians basically don't bike in winter. Pointed out by Not Just Bikes.
How much snow falls / the temperature have very little correlation to how many people use bikes, according to some study. Rather, the most important factors are:
1. Safe bike lane network, so cyclists can get where they want to go, and don't have to share or cross paths with high-speed motor traffic. Oulu has separated bike lanes, and they mark them with images projected from above rather than painting the concrete. Oulu's bike/foot paths are generally designed to be shortcuts, and there are lots of underpasses so pedestrians and cyclists can avoid roads, so in Oulu cyclists can make entire journies without encountering a traffic light or stopping.
2. Maintenance of snow. Currently, few cities do this well. Oulu maintains its bike paths. 2cm of snowfall and they plow. In Canada, they won't plow unless 5cm fall, and often bike lanes are sometimes where they plow snow into.