2015 Recorded Earth's Warmest Year

Research

The globally averaged temperature over land and ocean surfaces for 2015 was the highest among all years since record keeping began in 1880. During the final month, the December combined global land and ocean average surface temperature was the highest on record for any month in the 136-year record.

During 2015, the average temperature across global land and ocean surfaces was 1.62°F (0.90°C) above the 20th century average. This was the highest among all 136 years in the 1880–2015 record, surpassing the previous record set last year by 0.29°F (0.16°C) and marking the fourth time a global temperature record has been set this century. This is also the largest margin by which the annual global temperature record has been broken. Ten months had record high temperatures for their respective months during the year. The five highest monthly departures from average for any month on record all occurred during 2015.
Record warmth was broadly spread around the world, including Central America, the northern half of South America, parts of northern, southern, and eastern Europe stretching into western Asia, a large section of east central Siberia, regions of eastern and southern Africa, large parts of the northeastern and equatorial Pacific, a large swath of the western North Atlantic, most of the Indian Ocean, and parts of the Arctic Ocean.
The globally-averaged land surface temperature was 2.39°F (1.33°C) above the 20th century average. This was the highest among all years in the 1880–2015 record, surpassing the previous record of 2007 by 0.45°F (0.25°C). This is the largest margin by which the annual global land temperature has been broken.
and the sea surface temperature was 1.33°F (0.74°C) above the 20th century average. This was the highest among all years in the 1880–2015 record, surpassing the previous record of last year by 0.20°F (0.11°C).