lol yeah I want to bike to the grocery store in December in Chicago, come on.
Oulu is at least as cold as Chicago and has twice as much snowfall https://en.wikipedia.org/wiki/Oulu#Climate vs https://en.wikipedia.org/wiki/Chicago#Climate . I'm not saying that _you_ would wish to cycle in December but making it practicable for many is a choice, as Oulu shows.
Either way, cars are inherently less space efficient than bikes, because they occupy so much more road space per passenger.