It was 0.05C hotter than September last year, which in turn set the previous record high for the month. Scientists say it’s a clear indication of temperatures being driven up by emissions from human society.
Copernicus, which is the European Union's Earth observation programme, said warmth in the Siberian Arctic continues way above average. And it confirmed that Arctic sea ice is at its second lowest extent since satellite records began.
This year is also projected to become the warmest on record for Europe, even if temperatures cool somewhat from now on.
The elevated heat globally contributed to record wildfires in California and Australia. It also helped fuel the hottest day on record - a searing 54.4C (130F) in Death Valley.
Source: https://www.bbc.com/news/science-environment-54442782
