I would say make one out of a light weight quick drying nylon for warm weather. And carry a pair of light weight wind pants for colder weather.
I used a Brown Mountain hardware Kilt for a month during an AT thru. The material was heavier and thicker, when it rained it absorbed a lot of water and really weighed me down. I stopped wearing it because of this issue and the fact the pocket was lower down on the leg and if anything was in there it would swing quite a bit, wished it was higher up. In subsequent years I believe they used a lighter material.
Ideally I would want light weight quick drying nylon that came in a red and blue plaid pattern. That way it would look like an authentic kilt and not just a brown skirt.