What's your point?
I went riding yesterday for 90 minutes in the middle of the afternoon with 95°F actual temps and high humidity. As long as I was over 15-16 mph I was cool and comfortable. The slower I was for climbs or stopped at a crossing the hotter I was.
I'm not sure there is any overall benefit to training in the heat other than if you are use to it, you get additional days to ride or train. For certain if you are going to do anything in the heat, you need to work up to it. High temps do tax the body more and are less forgiving of things we get by with during cooler temps.