What Jules said.
If # 1 is comfortable. I admit to being conventional and not very aware of trends. I am so NOT a summer skirt- wearer, so not a good guide, either.
I know every is wearing midis with sneak but the shorter, just- below knee length looks better to my eye.
Also , in summer I may wear more tops untucked, with the pencil style you have option to wear boxy/ breezy shorter top
Or boxy hip- length.
This is based on the denim fabric also.
For a longer skirt, for warm weather, I might look at chambray, or linen blends, to be lighter and floatier.
There is a Nic+ Zoe skirt online at Nordstrom that I got in black linen, but also comes in a kind of chambray. But it’s only just long enough to knee- I’d actually like it an inch longer. It is not a midi but is floaty.
But it depends on how you like to look: dress/ move in your clothes, for me, skirts depend a lot on footwear you plan.