While I love my 16 oz wool "8 yarders", my go to kilts for hot humid weather are either my 4 yd box pleat pv, or my 4 yd 11 oz wool. I generally wear compression stockings so add a hose top to fancy them up a tad, sometimes garters, put on some light shoes or sandals and it's cooler than just about any outfit I own.

Here I am in Mexico:
http://mob1037.photobucket.com/album...psec2bdc10.jpg