Searing heatwaves saw records tumble across Europe last month, with unusually high temperatures within the Arctic Circle as well.
Temperatures averaged across July rose highest compared with a 1981-2010 benchmark in Alaska, Greenland, Siberia, central Asia, Iran and large swathes of Antarctica, Copernicus reported.
Wild fires unprecedented in scope and intensity burned across parts of Siberia and Alaska, releasing more than 100 million tonnes of CO2 into the atmosphere, while Greenland's ice sheet shed billions of tonnes in melted ice daily.
Africa and Australia were also well above average across most of each continent.
Globally, July 2019 was marginally warmer -- by 0.04 degrees Celsius (0.072 Fahrenheit) -- than the previous record-hot month, July 2016.
The new record is all the more notable because the 2016 record followed a strong El Nino, which boosts average global temperatures beyond the impact of global warming alone.
El Ninos are naturally occurring weather events triggered by periodic warming -- every three to seven years -- in the eastern Pacific Ocean.
Every month so far in 2019 ranks among the four warmest on record for the month in question, with June being the hottest June measured, the Copernicus team said in a press release.
Accurate temperature records extend into the 19th century, starting around 1880.
The Copernicus service is the first of the world's major satellite-based climate monitoring networks to report average July temperatures.
The margin of increase is small enough, it noted in a press release, that other networks -- such as the US government's National Oceanic and Atmospheric Administration (NOAA) -- may report temperatures equal to or slightly below the July 2016 record.
"Typically, there is a difference between the values provided by the global temperature datasets of various institutions, and the Copernicus difference between July 2019 and 2016 temperatures is smaller than this margin," the agency said in a statement.
"We have always lived through hot summers, but this is not the summer of our youth. This is not your grandfather's summer," UN Secretary-General Antonio Guterres said last week, announcing provisional findings from the World Meteorological Organisation.
"All of this means that we are on track for the period from 2015 to 2019 to be the five hottest years on record."
July 2019 will be around 1.2 deg C warmer than the pre-industrial era, according to the data.
Every year in the 21st century except one has been among the hottest on record, a fact that defies explanation without the input of manmade global warming, scientists say.
Europe has endured two exceptionally strong heatwaves in a matter of weeks.
Record highs tumbled across France, with the mercury peaking at 46 deg C on June 28 in the southern town of Verargues. The previous record, set back in 2003, was 44.1 deg C.
The second wave of heat saw Paris's all-time high pulverised last month: Meteo France measured 42.6 deg C in the French capital on July 25 -- more than 2 deg C hotter than the previous high, set more than 70 years ago.
Germany, Belgium and the Netherlands all also registered all-time high temperatures.