To echo the temperature comments, it's currently 45-48 almost touching 50 in DV in certain places at the moment and will continue like that into August, temperatures like this are common in and around the desert areas of the SW at this time of the year, and if you've not experienced heat like that - it's pretty miserable after a while. Honestly, if I was planning a trip - I'd try and move it to the later part of September or October, because it'll simply be more pleasant.
Another decent location around Vegas is 'Valley of fire state park' some amazing rocks formations and hikes
Another decent location around Vegas is 'Valley of fire state park' some amazing rocks formations and hikes