We'll be there at the same time, and were there at that time 2 years ago. I'd definitely plan on more jeans or long pants rather than shorts. 2 years ago, we wore long pants, and a couple of days changed into shorts for the afternoon, but we would have been OK in long pants still. We definitely would have been too cool in shorts in the morning and evening. We also took jackets everyday, and as soon as the sun started going down - which seemed pretty early - before 5:00, we all put our jackets on. We're from Texas and used to warm, muggy weather, so it felt cool and quite comfortable to us, but too cool for shorts most of the time. It might have been different if we were coming from somewhere cold with snow!