yes definitely a hat!

@jsco, thanks i thought of packing bathing suits, sandals, sundresses, sun hats, sun glasses, ans a nice dress for the wedding

cancun is so nice. it was super hot while I was there. I think I went around may. I'd bring a couple t-shirts or a really light longs level just because you can get sun exhausted. other than that just make sure you're comfortable in the heat!