

A good deal of the current Scottish population are descended from the Irish, which goes some way to explaining that side of your comparison, but I am not aware of Finland being particularly cloudy.
I have not consulted any climatic records, but I would have expected it to be less cloudy than the rest of Scandinavia, really, since the rain will have been deposited on the mountain in Norway and Sweden before the air masses reach Finland.
I’ve read the books and thoroughly enjoyed them and am now thoroughly enjoying the show. The emphasis of the show is different, certainly, but in this case I am happy with that. After the first episode in which I was all ‘It’s not that way in the book…’ I am taking as it is.
My SO has not read the books and is also thoroughly enjoying it. It is probably her favourite show at the moment.