Yes our car-dependent infrastructure is an issue, but it's infrastructure we've built up for the better part of a century. Changing it will be slow and gradual, and in the meantime cold weather and darkness are issues in much of the country. Also hot weather in other parts of the country (heat stroke can be a serious concern in the Southwest)
Helsinki is one of the Southern-most cities of Finland situated on the edge of a large body of water. Instead, take a look at this Not Just Bikes video covering biking in Finland during winter: https://youtu.be/Uhx-26GfCBU
The weather in Oulu during winter looks a lot like the weather in Sioux Falls, except there's a lot more precipitation (snow) in Oulu.
Pierre is the capital of South Dakota - though Sioux Falls is the largest city.
One statistic I've read for eastern South Dakota is that it's one of the worst states to live if you hate extreme cold and extreme heat as we have both - sometimes within a week of each other!
The weather in Oulu during winter looks a lot like the weather in Sioux Falls, except there's a lot more precipitation (snow) in Oulu.