Which is crazy a Boston's latitude is about the same as Rome. It came as a real surprise when so realised how far south the US is compared to the UK, or in fact most of Europe. Miami is the same latitude as Luxor in Egypt.

Born in the Nordics, I never felt I'm living very far in the north as it was south of the Arctic Circle and all. But there really aren't big populations that far up -- it was well north of Anchorage, for example. Russia has some inhabited northern places in Siberia like Norilsk, though solely due to the mining industry.

I guess Europe would look very different without the Gulf Stream.

The point of the post was "not all former social norms are always appropriate; here is one counterexample" not "I think every zip code has exactly this weather." Chiming in with a place where the social norm is appropriate is not interesting, because it is already the social norm.

But most of the US gets into the 90's for much of the summer, whereas London tends to have much cooler high temperatures.

Suits are totally impractical in the southern half of California about half the year. Unless you're in constant air conditioning, which is about as stupid as it gets.