NASA; Global Jan-Aug Temps Highest On Record; Land Temps Highest On Record, Sea Temps Highest Ever
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Global highlights: Year-to-date (January–August 2015)
The year-to-date temperature across global land and ocean surfaces was 1.51°F (0.84°C) above the 20th century average. This was the highest for January–August in the 1880–2015 record, surpassing the previous record set in 2010 by 0.18°F (0.10°C).
The year-to-date globally-averaged land surface temperature was the highest for January–August in the 1880–2015 record at 2.32°F (1.29°C) above the 20th century average. This value exceeded the previous record of 2007 by 0.29°F (0.16°C). Much of the world's land surface experienced much-warmer-than-average conditions during the first eight months of the year, with much of South America and parts of North America, Africa, Europe, and Asia experiencing record warmth.
The year-to-date globally-averaged sea surface temperature was 1.22°F (0.68°C) above the 20th century average and the highest for January–August in the 1880–2015 record. This value surpassed the previous record of 2014 by +0.13°F (+0.07°C). A large portion of the northeastern and equatorial Pacific Ocean observed record warmth, while the other major basins observed record warmth in some areas.
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http://www.ncdc.noaa.gov/sotc/summary-info/global/201508
