Last month smashed through the previous October temperature record, from 2019, by a massive margin, the EU's Copernicus Climate Change Service (C3S) said.
The record-breaking October means 2023 is now "virtually certain" to be the warmest year recorded, C3S said in a statement.
"When we combine our data with the IPCC, then we can say that this is the warmest year for the last 125,000 years," Burgess said.
The only other time before October a month breached the temperature record by such a large margin was in September 2023.
Michael Mann, a climate scientist at University of Pennsylvania, said: "Most El Nino years are now record-breakers, because the extra global warmth of El Nino adds to the steady ramp of human-caused warming."
Persons:
Akhtar Soomro, Samantha Burgess, Copernicus, C3S, Burgess, Michael Mann, El, El Nino, Piers Forster, Kate Abnett, Jan Harvey
Organizations:
REUTERS, Rights, Union, El, University of Pennsylvania, El Nino, University of Leeds, Thomson
Locations:
Jacobabad, Pakistan, Rights BRUSSELS, El Nino, Libya, South America