I particularly enjoy a copper beech in the summer because it stands out magnificently from the ubiquity of green. It also seems to look cooler in days of burning sun.(image from here)
The last time I remember us having such a long hot summer was in the extraordinary year of 1976. I was fortunate to be working at Oxford University Press in Oxford, in a building that has enormously thick walls, and so arriving early and leaving late I avoided much of the heat.
(image above from Bing maps showing the replacement tree today-ish)
Also, in the quadrangle there was a giant copper beech, taller than the building, which created a delightful shade under which to eat lunch if there was a wee breeze. Unfortunately I learned some years ago that the tree died; but has been replaced by a youngster, who has a hundred years or so to go to catch up with its predecessor.
Another memory from that summer is receiving a phone call from an artist who was always coming up with excuses for late delivery - this time it was that the extreme heat had caused his mother-in-law's garden shed to explode!