Blended land and sea surface temperature percentiles from June 2014 to August 2014.

(National Climatic Data Center)

The summer of 2014 is officially the hottest since the modern instrumental record began more than 130 years ago, according to the latest state of the climate report from NOAA's National Climatic Data Center.

August 2014 also was the hottest August worldwide in records dating back to 1880, the report adds, as the combined average temperature across global land and ocean surfaces was 1.35 degrees F above the 20th century average of 60.1 degrees F, breaking the previous record set in 1998.

Warmer-than-average temperatures abounded across most of the world's land surfaces, except for parts of the eastern United States, western Europe and parts of Asia and Australia.

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Both the U.S. and Russia had weather stations that reported record warm temperatures as well as at least one record cold temperature, the report adds, while the United Kingdom and Austria had their coolest Augusts since 1993 and 2006, respectively. In the U.K., the unusually cool August ended a streak of eight consecutive warmer-than-normal months.

There was no cooldown for the world's oceans, however. NOAA reports that the average August temperature for the world's oceans was 1.17 degrees F above the 20th century average, topping the previous record set in 2005.

NOAA notes that the oceans were "a major contributor to the global average" warmth in August, as the departure from average for the world's oceans during the June-August period this year was also highest on record, at 1.13 degrees F above the 20th century average.

See the full report at NOAA's National Climatic Data Center.

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A man on duty at the Holborn Oasis swimming pool in London, suffering in the July heat. (Keystone/Getty Images)