Oh God , here we go again. Get a better AC. Mine will put out 45f to 50f degree air on a 90f degree day. Now, the next thing that happens is that someone tells you that's impossible and it will freeze up. No, it doesn't. True, I have a older AC and it's still using the old style refrigerant. But, someone on here said that they had a AC called Penguin that worked as good as mine. I have heard, but do not know, that the Atwood AC's are good too.
The Coleman Mach's are junk. My brother has one. They are also the company telling everybody that you can only drop your air by 20 degrees. That is just something they made up to cover there junk AC units.