According to scientists from Commerce's National Oceanic and Atmospheric Administration (NOAA), 2010 tied with 2005 as the warmest year of the global surface temperature record, beginning in 1880. This was the 34th consecutive year with global temperatures above the 20th century average. For the contiguous United States alone, the 2010 average annual temperature was above normal, resulting in the 23rd warmest year on record.
This preliminary analysis is prepared by scientists at NOAA’s National Climatic Data Center  in Asheville, N.C., and is part of the suite of climate services NOAA provides government, business and community leaders so they can make informed decisions. Release  | State of the Climate Annual Report