Super hot weather like that is still hot, but it really isn't as bad with low humidity. The air isn't all thick and humid, so you can still breathe without trouble. You're able to keep cool(ish) by sweating so long as you keep drinking water, unlike on a 95% humidity hot day. If you get out of the direct sunlight, it's often much cooler. If there's a breeze, it'll often be cooling because the air doesn't necessarily hold that much heat without all that water vapor in it.
I lived in southern New Mexico while going to college, and we'd have temps up to about 110 in the summer. My house had a swamp cooler - it only brought the inside temp down into the 80 or 85 degree range, but the difference between that and the outside temp made it quite tolerable. It also brought the indoor humidity up which was a nice side effect.
In another month here in Maryland it'll be 95 and humid every day, just gross and unpleasant to be outside. I'd take hotter and dry anyday.