Denmark is at least as crazy about biking as Amsterdam. In Copenhagen it's a major advantage to be on bicycle, specially in rush hour where you easily get from A to B 2-3-4 times faster than cars.
Rain is not really a factor, Copenhagen is rainy all the fucking time. Steep roads definitely is. But it isn't all. In Buenos Aires, which is relatively flat, I saw maybe 3-4 bikes in as many weeks. The major factor, IMO, is presence of bicycle paths and the fact that bicycles are actually a part of the design of the 'traffic flow', which means that bikers are first class citizen in Danish cities, while I would never even fuckin' dare to ride a bike in Buenos Aires - it's simply not safe.
Automobile ownership happens to be discouraged in Denmark. Naturally, people bicycle in a nation in which it is essentially illegal to own a car. http://www.google.com/search?q=denmark+car+tax
Ok, there is a 180% tax on cars. 15k Honda fit = 42,000$ (ouch), but that just makes the used car market more valuable. I had a working old Volvo that was worth ~1k and needed 1-2k of work done per year to keep on the road. So buying one of those would have cost 2.8k with 1.8k of that in tax so it's not exactly making car's illegal and keeping it on the road cost is only 200$ / month. You just need to find the loophole.
Rain is not really a factor, Copenhagen is rainy all the fucking time. Steep roads definitely is. But it isn't all. In Buenos Aires, which is relatively flat, I saw maybe 3-4 bikes in as many weeks. The major factor, IMO, is presence of bicycle paths and the fact that bicycles are actually a part of the design of the 'traffic flow', which means that bikers are first class citizen in Danish cities, while I would never even fuckin' dare to ride a bike in Buenos Aires - it's simply not safe.