I have noticed the past day or so that my AC is not working right in the afternoon. I tried it this morning and it got cold. Does it need to re-charged?

It may be loosing it's charge. They can put some dye in there and see if there is a leak. I'm seeing lots of topics on A/C problems with Durangos which doesn't bold well for me when it's in the upper 90's here every single day. Mine is working okay on the '07 however it doesn't blow near as cold as my Mustang or even 2000 sentra.

yeah I'd get it charged and put some dye in it. It'll show you where the problem is.