In 16-20°C weather I would wear. 1st layer – sundresses, or shorts and t-shirt, or leggings. 2nd layer – with some kind of sweater like a cardigan (maybe just a hoodie) 3rd layer – some kind of wind-breaking layer like a denim/ canvas jacket, or a windbreaker, or a hoodie (pullover or zip up) I usually have a scarf – lighter like cashmere or …
https://www.reddit.com/r/femalefashionadvice/comments/ucxaus/what_to_wear_for_1620c_weather/

