I live in Utah where we have some pretty extreme weather. Down to 5 degrees F. in the winter and up to 105 F. or so in the summer. I can live quite well with a 13oz or 16oz wool kilt 90% of the time. When the weather gets in the 90s or higher I like a lightweight kilt but if I had to choose one, it would be the wool.

Sorry about the farenheit stuff. I can't think in celsius very well.