Trust me, I am NOT complaining (remember, I waited 10 months for summer to return to Iowa). The heat does make it a bit more of a challenge to enjoy the great outdoors, though.
I'm still taking most of my cardio workouts outdoors. Even when the mercury is off the charts, and it's hotter than Hades, I usually shun the inside option. I figure if I'm gonna be sweating anyways, I might as well enjoy the scenery.