I've lived in Las Vegas for 11 years and commute during the Summer, and have even gone for recreational rides at 1:00pm. The heat takes some acclimatization each year but doesn't bother me too much. I currently ride TO work between 2-3pm but it's downhill so I don't get too worked up (the trip home is after 12:00am and quite pleasant). Riding home during the hottest time of day you could do whatever necessary to keep cool - wear "real" cycling clothes, soak yourself at a park, etc.
Last edited by Eric S.; 06-19-19 at 12:40 PM.