I hate rain. It takes the paint off my plane when I am flying through it. The audience is miserable. If my feet are wet, they could slip off the petals. I can't see very good because it obscures my vision.
Rain is very, very, very bad.
Low clouds can also limit visibility, making things scary, according to Wagstaff. For spectators, there's the threat of lightning strikes. Weather is one of the few things that can keep aerial acrobatics out of the sky. But when it permits, the pilots take to the sky to dive, roll and twirl. We are flying on the edge of edges and we want to push it right there, but you can't cross the edge.