I don't just believe it, I know it to be true. But you don't have to believe me if you don't want to. Check it out for yourself. Here, I'll help you. This is the yearly temperatures at Casa Grande Municipal (KCGZ):
This graph is from here, if you want to check it out for yourself. The vertical blue line is today, so you can see the temperature is pretty much near the peak this time of year. If you are interesting in only October 25th, you can go here and see the temperatures I posted earlier.
I have presented you with facts and data, you can provide your own data that shows what you think to be true and I will look at that. I think you will find, if you bother to do the slightest amount of research, that I am correct and you are wrong.
I think this has more to do with why you are so down on this particular fly-in than the weather does. You won't get any sympathy from me, though. I have yet to attend a fly-in where anyone is willing to pay me to attend. Not only do I have to pay for my own fuel, I also have to pay my own entrance fee, and buy my own food. So, I'm sorry your gravy train ended, and maybe I would be upset if I no longer got something for free, but the majority of people have to pay their own way.