I'd ride...102 is pretty hot, but it's the evening and the sun isn't nearly as harsh. Plus, we are talking TX here, if you won't ride in the 100's, when are you going to ride in the summer? Only the wee AM hours afford any reasonable temperature this time of year. Though, I wouldn't ride mid-afternoon when it's that hot since the pavement will fry you every time you have to stop. It seems like the hotter it is, the more red lights I hit.

Happy riding!