We are going this Sat. for 6 days, the weather reports look good, high 84ish, low 60's. Do you find yourself being most comfortable in jeans, shorts, or capris, tanks or t's, jackets?
It may well depend on what you're used to climate-wise. Someone coming from Minnesota may feel really warm at 84/60 degrees, while someone from Arizona might find it chilly.
Personally? I think you should wear whatever YOU are comfortable in. I would wear shorts and a tee shirt in the day and bring along a sweatshirt for shows/attractions indoors and after the sun goes down...