I live here in the Valley of the Sun - Gateway to Hell, AKA Phoenix, Arizona. I've worn kilts thru 2 of the "burning" seasons here & part of a 3rd. I find an Original UtiliKilt, t-shirt & sandals (& a wide-brimmed hat for extended visits in the solar oven) keeps me as cool as possible when it's 110F (43.3C) or more (but it's a dry heat ). Of course, I wear mine "commando" (as God intended) - it helps to have a breeze between the knees!