Go right ahead. IIIRC, you are in the DC area so you have humidity. Whoever devised the "heat index" or "real feel" needs to go back and do it over.
I will take 115 with 15% humidity any day over 85 and 70%. I can get into the shade and get much cooler. You can't get away from the humidity. They always say to turn your A/C down when you leave the house to save energy. If we had done that in WV when it was 95/80%, we wouldn't have been able to get the house cool enough to sleep.
Out here, we set it up to 78 when we leave, and even on a 110 degree day, come home and turn it on, it has the house back to 70 or so in less than an hour.
We are at a similar elevation as Kingman and we are supposed to hit 112 two days this week.
While I'm not interested in having 115, I agree with you about humidity being harder to take than higher temperature.