While the city has been making a lot of improvements with bike infrastructure, I feel like there are still a lot of pain points in the system. Many bike lanes are still only indicated by paint or flex-posts (which do absolutely nothing for safety), there are still many dicey left turns, and bikers get virtually no accommodation during construction (see the Cedar Lake Trail disaster).

This is a big deal, because for inexperienced cyclists, their perception of safety is dictated by the most unsafe portion of the journey, not the average safety.

I don't think the weather has that much to do with it. There are hotter and colder cities out there with higher bike ridership then Minneapolis. Good infrastructure is the number one contributor to bike ridership, and weather is a secondary factor at most.