2014 was Earth's warmest year on record, a U.S. weather agency announced today, with average temperatures 0.07 degrees Fahrenheit above the previous high. The National Climatic Data Center, a division of the National Oceanic and Atmospheric Administration, noted the average temperatures over land and oceans were higher in 2014 than any year since 1880, when record-keeping began. This past December also had the third-highest average global land temperature -- out of any December in the past 135 years -- at 2.45 degrees Fahrenheit above average, according to the same agency.