A weather when you can go out wearing actual clothes (with sleeves!), without being soaked in your own sweat after 5min. Bike riding became a lot more fun and the difference to the ice cold air conditioned indoor spaces was not so big anymore. You can enjoy the sun now, not fear it.
Right in time I rediscovered pictures of an old fashion catalogue I found at my grandma's. It is a summer collection of 1957 of a Bavarian fashion house.