State of the Climate Global Analysis July 2010: Second Warmest on Record - NOAA
• The combined global land and ocean average surface temperature for July 2010 was the second warmest on record, behind 1998, at 16.5°C (61.6F), which is 0.66°C (1.19°F) above the 20th century average of 15.8°C (60.4°F).
• The July worldwide land surface temperature was 1.03°C (1.85°F) above the 20th century average of 14.3°C (57.8°F)—the warmest July on record.
• The worldwide ocean surface temperature was 0.54°C (0.97°F) above the 20th century average of 16.4°C (61.5°F) and the fifth warmest July on record. The warmth was most pronounced in the Atlantic Ocean.
• La Niña conditions developed during July 2010, as sea surface temperatures (SST) continued to drop across the central and eastern equatorial Pacific Ocean. According to NOAA’s Climate Prediction Center, La Niña is expected to strengthen and last through the Northern Hemisphere winter 2010-2011.
• For the year-to-date, the global combined land and ocean surface temperature of 14.5°C (58.1°F) was the warmest January-July period on record. This value is 0.68°C (1.22°F) above the 20th century average.