[bertil]

The worst weather when riding a bike is the wind (trust me: I live in the Arctic circle, we have snow or black ice on the road half the year and it’s routinely -25ºC; bikes handle both fine). The Netherlands has more wind than anywhere on land. It can be literally impossible to bike against the wind without the local training when it’s strong enough. If they can do that, I doubt a mountain pass would scare them.

And it rains, a lot. Which is fine if it’s vertical and you have a rain coat, but Dutch people made windmills, the Netherlands and horizontal rain. No coat can protect you from that.

The weather band is indeed narrow, but half of that band is terrible.