I’d say warmer spring/ autumn or summer days that aren’t super hot. Say around 15-25 degrees.
I love being able to just throw on a dress or shorts/jeans and a t-shirt/shirt and not worry about co-ordinating loads of items together.
I find winter dressing hard as my house is so blooming freezing I always end up layered up and looking a complete mess. I also hate being really cold outside then roasting in my coat when I go inside somewhere too and having to strip off and carry loads of layers around