I live in the South and yes, it is quite hot.  But the office is air-condition.  I, too, have worn pantyhose for so long, I cannot imagine going to work without them.   I tried it because sooo many women do that here, but  I agree, skirts do not look right without stockings, I don't care how tanned your legs are.  It looks just plain sloppy, unprofessional and far too casual.  Today is Friday and though my top and slacks are casual, I am wearing slip-on leather wedge sandals, that are very attractive; my legs are tanned, my toe nails polished, feet clean and pampered, but I still wear stockings.  I love the new toeless ones, too.