Claybird, I hear you on the humidity and indoor temps! I am miserable in humid climates.
I am using the outdoors temps as a guideline - so for me, when it is 100 outside. I don't know what my indoor temps would be as I have no way to measure in here. I am hoping that my techniques can keep things significantly cooler than outside.
I love fresh air too. I really do try to air things out inside my home daily, even in winter, if only for a few minutes to get some good air exchange.
What's nice right now about having the windows open and no AC on is that I can hear all the outside sounds - birds, wind in the trees, randy feral cats screeching...