Hottest ride:
http://connect.garmin.com/activity/101337922
109.4 degrees in Buffalo NY. The ride was supposed to be 2x longer but when I had to get off the bike to rest after 10 miles, it was pretty obvious that wasn't going to happen, so I bailed.
Generally speaking, I don't like anything 85 and above; my endurance is dramatically lessened in those conditions. I usually puff up like a marshmallow as well, and my heartrate spikes high and stays high even when I stop cycling. Ugh, heat.