>>508152143I live in Colorado without AC and it got up to 91F today around 32C.
I feel okay.
What you do is you put any kind of fan you can actually fit into your window. My windows are big enough for box fans so I put those in.
The air must have an exit so you open up a window opposite of the fans somewhere doesn't necessarily have to be in the same room just somewhere for air to flow out of.
You do this at night. 4am is the coolest time but I do it all night until 6:30 pm I even set my alarm and then I close up my house like a bubble.
You may during the day leave one window slightly open in the most upstairs area to allow a little heat to escape. Do not open more than one window and the heat vent window during the day needs to only be slightly open or half way open.
And you'll stay a lot cooler.
It's a bit of hassle but again, I don't have air conditioning and have to manage my house so it doesn't get too hot.