Most of Europe is far drier than the US. I don't know of any place in Europe which would be similar to Japan or Florida (consistent high heat and very high humidity during months on end in Summer), though they might very well exist.
Even if you did have the average high summer humidity index for Europe and the US (personally, after having lived in the swamp that is Maryland & Virginia, I'd take a look at them), you still need to overlay the temperature index. 100 relative humidity in Oslo doesn't mean a whole lot when it's a balmy 21C, right?
That davidu is not exactly fair in his declaration.
> As someone else said, if you just cruise at a conservative pace, you don't even sweat very much.
I'm the one who said that...