I ended up with double socks, double hats, sweatshirt & coat, scarf, gloves, double flannel pants over jeans, and rain pants over those. And I was still cold. It's currently 51F/11C. Not amused with this whole "autumn" idea.
I went out jogging in a t-shirt in 11°C, and my younger brother went to school in just a t-shirt. In fact, the average temperature this summer was 8°C in June and 13°C in July. Yay, climate.
It is between 0 and 5°C now, though. I kinda like (proper, cold, non-wet) winter, but not fall when the summer was just skipped almost entirely. July 28th, one of the only days we were able to head out to the sea house:

Why, yes, those are felted wool slippers. It was 14°C, both in the air and the water.