Lee.. in July most of mex will be hot.... Puerto Vallarta is a nice place..
the old downtown area has some great shopping.. there are several excursions, jungle tours, boat tours etc.. The fishing should be good there in July. no cow tuna, but marlin, sails, dorado offshore, and roosters, pargo , etc....inshore. The thing we liked best about PV was that you get the feeling of old mexico and not the vegas style scene, which is prevelant in Cabo or cancun..... Shop around, there are lots of all inclusive deals to be had for that area.. Good luck