Hot and humid hot lap

Having stayed off the bike all week due to the hot weather I was keen for a quick lap just to stretch my legs. Started the ride at around 6;00pm with temperatures still at 33 degrees and high humidity.
I didn't plan on having a fast lap, just wanted an easy ride without over heating. As I was riding I thought I was making good time and decided to push on a bit, without going to hard because it was still hot.
Fell off the pace for the last 5 minutes but still managed a 26:36 which is around 2 minutes under my previous best time. Didn't touch propedal or fork so I could prob shave a little off the hills with that but I wanted to leave the bike as I normally ride it.