Depends on humidity and engine speed, among other things

Referring back to your other thread, have you had the full performance test done?

 

I know there a lot of factors involved but I'm just trying to get a base number of where my air should be. Regardless of the temperature I'm thinking that my air conditioning should be at least 30 degrees cooler than the outside temperature.

My vehicle is at the dealer as I speak and I'll just have to wait and see what they come up with for the third time now.

 

This is where we should all be. I believe the listed temperatures are the "feels like" temperature, meaning humidity needs to be factored in.

Engine at operating temp at 1 kRPM, doors/windows closed, rear AC set to full cool and high blower, transmission in park, measurement taken at the driver side center vent, AC clutch engaged.

Edit: From the Durango service manual.

 

I have always heard that AC systems will not cool more than a 20 degree difference.
The higher the humidity the smaller the difference. But I'm not sure of an official answer.