We'll be in Red Rock next week and we're looking for some beta on where to go to beat the heat. Looking for either trad or sport, 5.9 and below. Thanks!

Mt. Charleston is a good bet for sport climbing with lower temps.
Starter Crag
Walla Walla Wash
But if you insist on climbing in RR
check out THE RED ROCK STICKY THREAD
There are links to numerous threads about this topic