> far north of Norway (Troms & Finnmark). Not quite as cold as Canada, maybe, but close.
Not even close! The Gulf Stream keeps them nice and toasty. Tromsø or Hammerfest, for example, sees wintertime overnight lows similar to e.g. Worcester, Massachusetts (28 degrees of latitude further south). A far cry from places like North Dakota where the daytime highs in December and January are colder than the overnight lows in Tromsø, let alone places in inland Canada.