Why only 100d/y while Norwegian works around 190d/y? In my experience people tends to have a “main” commute mode that they only turn away from in exceptional cases. Easier to live with habits that mixing your timetables every other day.
https://en.wikipedia.org/wiki/List_of_countries_by_average_a...
Also, "volume of rain" might be misleading because it doesn't give you a feeling for how often it rains. The Highlands in particular can have a light rain that falls for weeks at a time (or at least seems like it if you are in a tent).
I remember one time a few years back when I lived in Stavanger, I went to the post office in the city center there in a bright nice summer day and came out to torrential rain and rivers in the street!