Researchers said that this September was the warmest one on record.
National Oceanographic and Atmospheric Administration (NOAA) said that the global temperature in September was 60.21 F, about 1.21 F above the 20th century average for September.
It marked the 331st month in a row that global temperatures were above the 20th century average, said CBC News.
The last one found below the 20th century average was February 1985.
The NOAA report said that the higher than average temperatures occurred mostly in southern Greenland, Paraguay, northern Argentina, western Australia, Japan, Russia and Canada.
The US itself was not particularly warm in September, however, being only the 23rd warmest September on record, said Mother Nature Network.
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Arctic sea ice was also the the smallest its ever been in recorded history at 1.39 million square miles in September.
Oddly, Antarctica had the largest amount of sea ice in its recorded history last month, particularly on September 26th.
Researchers said that Antarctica's ice is likely due to stronger-than-average circumpolar winds that spread out ice.
"The magnitude of the records in each (Arctic and Antarctic) are vastly different," said Deke Arndt, of the NOAA, reported the Sydney Morning Herald.
"The Arctic is plumbing new depths, completely leaving the rest of the record behind ... there kind of aren't enough superlatives to describe what has gone on there over the last five or six years."