Globally, August 2021, along with August 2017, was the third-hottest summer on record.
The average June-August temperature was nearly 1.0C above the 1991-2020 average, according to Copernicus, the European Climate Change Service. The previous warmest summers of 2010 and 2018 were 0.1 degrees colder.
Globally, August 2021, along with August 2017, was the third-hottest August on record, just over 0.3 degrees Celsius warmer than the 1991-2020 average.
Copernicus service data have been tracked since 1950, but are checked against other datasets from the mid-19th century.