I spent a summer at those interior temperatures without AC. I stopped "noticing" it, but my subjective ability to focus and objective running & flash-card-app performance did not recover until the temperatures did. How long does it take to "get used to it?"
A couple weeks, according to folk wisdom, which matches my anecdotal experience.
I'm curious if you went home to cooler temperatures, or if your whole summer was spent in warmth? I definitely have experienced harder times going back and forth vs. always being in the warm environments.
I spent the whole summer in warmth, days and nights. A couple weeks is what it took me not to notice it anymore, except insofar as it affected my performance. That's what I meant by "live with it."