Yep, it's 91F outdoors (33C for you Celsius people) and I am wearing an all-over body suit. This one is from Solumbra, and it has all kinds of vents to cool ya down, and it is loose. When it gets to 98F (??C) it will still feel hot out there, though.
According to the dermatologist, sun damage cannot be reversed* but using sunscreen and sun blocking clothing it can be prevented from getting worse.
*maybe the bumps can be sanded off or peeled -- ouch!