Today's ride had a starting temp of 86 and ending temp of 88, with medium humidity. It was plenty hot, especially in the sun...but actually not bad in the shade on on descents. I did drink 2 bottles in 2 hours, and luckily it was a recovery/Z2 ride so I did not have to hammer. If it was to be a hard ride, I would have likely overheated.
#LoveMyHaloHeadband