Expect comfortable weather with lots of sunshine and very low humidity. Although daytime temperatures will likely be near the low 90's, the ultra low humidity will likely mean you won't be uncomfortable. Because of the low humidity, once the sun drops behind the mountains to the west at sunset the temperature will drop about 10 degrees leading to pleasant evenings with temperatures in the upper 70's. The typical overnight/morning lows will be in the low 60's.
There's lots to do in the desert or just relax at the hotel resort. The "Things To Do" page has a few ideas to start, but a quick search on your phone will lead to many other options. The hotel concierge may have some ideas to consider too.
We request semi formal attire for the church and reception. Any other time around the hotel or out and about in the desert is casual and comfortable attire.