Are you feeling clueless about texting abbreviations? Did you receive a text or email with R&D, or maybe you saw R&D on one of those social media sites like Facebook, Twitter, or Google Plus, and your problem is that you have no idea what R&D means? That can be frustrating and/or embarrassing, but it's no problem!
Most / Least Educated Cities in AZ. The average temperature of Vernon is 51.76Â°F, which is much lower than the Arizona average temperature of 65.97Â°F and is lower than the national average temperature of 54.45Â°F.
Population Demographics: The City of Mt. Vernon (15,277 pop.) experienced a population decline of 4% while Jefferson County (38,827 pop.) experienced a population decrease of 4% from 2000 to 2010. This shift is attributed to the development of residential projects just outside the incorporated area of the City.