Fan management. I would place a window fan in a sunny window blowing out, and a window fan in a shady window blowing in. When the sun moves to the other side, flip them.

A ceiling fan running also helps alot. The trick is to air moving.

I also kept a cool bathtub full on the hottest days. I'd just strip and sit in the tub until I was cold. Get out and and I was good for about an hour.

Right now, we just have a little window AC in the bedroom, because my wife has let herself so fat she cannot dissipate heat well. But I am fine without AC. Humans lived for 10,000 generations with AC, you can too.