AdvertisementU.S. Will Be 2-4 Degrees Hotter In Coming Decades, New Climate Report SaysJanuary 11, 2013Bill ChappellfacebookEmailA map depicts temperature changes over the past 20 years, compared to the average between 1901 and 1960. "The period from 2001 to 2011 was warmer than any previous decade in every region," according to the National Climate Assessment. (NOAA NCDC/CICS-NC)