I'm in the central Arizona desert with a black Trail parked in the open at work all day long. Yep, it's hot when I get in at 4pm to drive home. I turn it to max cold settings and roll down the windows for about a minute.
I have a ten mile drive home and about halfway home I usually have to turn the setting to blow partially on my feet because it's now too cold at max blowing on my upper body.
I suppose when it's 112 degrees out, any air conditioning is enough.
And, the only thing I've learned in this thread is that Nissan blows.