NOAA says: The combined average temperature over global land and ocean surfaces for July 2015 was the highest for July in the 136-year period of record, at 0.81°C (1.46°F) above the 20th century average of 15.8°C (60.4°F), surpassing the previous record set in 1998 by 0.08°C (0.14°F). As July is climatologically the warmest month of the year globally, this monthly global temperature of 16.61°C (61.86°F) was also the highest among all 1627 months in the record that began in January 1880. The July temperature is currently increasing at an average rate of 0.65°C (1.17°F) per century.
Separately, the July average temperature across global land surfaces was 0.96°C (1.73°F) above the 20th century average, the sixth warmest for July on record. Large regions of Earth's land surfaces were much warmer than average, according to the Land & Ocean Temperature Percentiles map above. The average temperature for Africa was the second highest for July on record, behind only 2002, with regional record warmth across much of eastern Africa into central areas of the continent. Record warmth was also observed across much of northern South America, parts of southern Europe and central Asia, and the far western United States.
Read more on NOAA's website- http://www.ncdc.noaa.gov/sotc/global/201507