Where I grew up (Edmonton, Alberta), the winter is a force to be reckoned with as not only does the sun not melt the snow away once it’s settled in October, but “warm” days bring 6+inches of slush that can then freeze solid to the roads and sidewalks if it’s not cleared before nightfall.

Biking was practically impossible (and very dangerous), and sometimes even walking a few blocks was a challenge. That being said, I’d still advocate for places like Edmonton being “15-min” cities, and in-fact it would make it much easier in the winter when transportation is more limited.