Analysis by NOAA shows that in 2014, the combined land and ocean surface temperature was °F (°C) above the 20th century average, making the year the warmest since records began in 1880. The ocean alone was record warm, while the land alone was fourth warmest. Five months set new records for warmth: May, June, August, September, and December. October tied for record warmest. The 20 warmest years in the historical record have all occurred in the past 20 years. Except for 1998, the 10 warmest years on