Jeep Repair: Squealing Noise, grand cherokee, noise complaints

Question
I have a 2007 Grand Cherokee V6 3.7L engine.  It has approx. 75k miles.  I have a squealing noise which appears to be coming from behind the front console...to the right of the radio cluster.  I live in the southwest and the squealing only happens when it hot outside (temp greater than 95 degrees).  It also only happens when the speed is greater than 65 mph.  The problem started about 2 years ago and only presents itself in the summer months. The squeal goes away when I slow down or if it's cooler outside.  It never squeals during the winter months.  I do not believe it's the AC because it occurs even when the unit is not running.  I suspect the heat is causing some fluid to thin resulting in air in a line (just my uneductated guesss).  Thanks

Answer
Being that I live and work in a much cooler part of the country this is not the sort of complaint I would have any experience with. Diagnosing noise complaints, such as yours, really needs to be done first-hand. I would advice you to have a professional listen to the noise you're hearing.