That's fine. I don't mind rain. I actually prefer it to sun because my pupils don't contract enough so I'm always squinting and looking weird when I try to talk to people outside in the sun (and this is with sunglasses ) OOO! It's going to be so hot! Be careful of how dusty and sort of suffocating it can be. If you need to sit, SIT. But the art You will be overcome by art. I would love to see them in Berlin. Good luck getting tickets! Who are you seeing them with when you go?