It gets nowhere near as hot or as cold as most of the US. It is like most northern European coastal countries...maybe negative temperatures in winter, maybe 29 degrees on the hottest day in summer...the only months where the weather is really different are July and late December/January. Weather is pretty much the same all year round apart from that (just to be clear, I live in a coastal area close to the Netherlands).

The non-coastal regions of the US are more like Eastern Europe where you can get 35 degrees in the summer and -20 in the winter.

It totally is. In summer I go out on the bike for fun all the time. In winter? No way - essential trips only. And I'd say that's typical for all Dutch.