We are leaving next week too. My plan is to take shorts and teeshirts for the day, with one or two pairs of pants and a sweatshirt for at night. I am hoping that will work. As of now, the 10 day forecast says high temperatures from 79-80 degrees and that is definitely shorts weather for us. Low temperatures are in the low 60s, not quite shorts weather, but that probably reflects the pre-dawn hours and we wont' be out and about then. But I'll keep watching the forecasts and change my packing plans accordingly.