My parents still don’t use AC. The windows stay open all summer unless there is a rainstorm. Whole house fan is turned on at night to draw in cooler air. Much time spent in the cooler basement if you are going to be hanging at home. At night you are basically sleeping naked on top of your fitted sheet with one or two window unit fans circulating air. Maybe another fan pointed directly at you. Basement had some dehumidifiers and afaik that was the only problem moisture area.

If you are OK with the heat maybe a dehumidifier would be able to address the humidity problem while still saving electricity compare to the AC.

A dehumidifier is basically an air conditioner that exhausts its heat back into the room. It will make the air warmer (but dryer).