Aren't they in Oslo?
That seems quite specific. How do you tell?
From what I see it's probably not winter (lack of snow), not autumn (lack of leaves on the ground). But that still leaves a pretty long time period with a bigger range of temperatures.
Apparently the average temperature in 1890 was 1.3 C colder than it is now.
Source: Born and living in Oslo.
Well, that's fairly short by U.S. standards, at least when counting 20+ C weather, which in many states is nearly 6 months of the year, with summer heat lasting well through September in many places.
Even places south of Norway, like Netherlands, still considered pretty far north for many in the world, have relatively 'short' summers as well.
https://www.boredpanda.com/blog/wp-content/uploads/2017/12/s...
Suits are always too many layers