The top 200 largest metro areas in the U.S. were analyzed to compare their average annual temperature and their overall rates of warming. Only those cities with climate stations having complete data records going back to 1965 were included. Data for the top 200 largest cities was accessed via ACIS (http://www.rcc-acis.org/)
The Hottest cities in the U.S. are ranked according to their average annual temperatures from 1981-2010.
The Fastest-Warming cities are ranked according to their rate of warming of annual average temperatures from 1965-2015.