Ah, maybe from the point of view of Americans and people from poor countries people bike because they have to, but in Europe it’s mostly because it’s convenient, healthy and pleasant.
It's also not ideal when the sun both rises and sets while you're at work, so you have to bike in the dark everyday for three months. But that's strictly speaking not about climate...
And that's Copenhagen. Stockholm is worse in every possible way, darker, colder (OK, it's not as windy) and few bike lanes. Still, more people bike there than in LA or Miami.