So we all know the U.S. has been under a heating lamp for the past few weeks. Throw in large amounts of humidity and it's miserable. I only drive my MR2 with the top down so A/C might help, but very little. So I'll call the peak hot limit (for me) at ~90 degrees F and ~85% humidity. Over those numbers and I let the car sit - I use my DD with A/C. What do the rest of you do?