The first six months of 2015 comprised the warmest such period on record across the world's land and ocean surfaces, at 0.85°C (1.53°F) above the 20th century average, surpassing the previous record set in 2010 by 0.09°C (0.16°F). It should be noted that 2010 was the last year with El Niño conditions; however El Niño had ended by
this point in 2010, while it appears to be continuing to mature at the
same point in 2015.
The average global sea surface temperature of +0.65°C (+1.17°F) for the year-to-date was the highest for January–June in the 136-year period of record, surpassing the previous record of 2010 by 0.04°C (0.07°F). The average land surface temperature of +1.40°C (2.52°F) was also record high, surpassing the previous record of 2007 by 0.13°C (0.23°F).