Every month since June 2023 - 13 months in a row - has ranked as the planet's hottest since records began, compared with the corresponding month in previous years, the European Union's Copernicus Climate Change Service (C3S) said in a monthly bulletin.
The latest data suggest 2024 could outrank 2023 as the hottest year since records began after human-caused climate change and the El Nino natural weather phenomenon both pushed temperatures to record highs in the year so far, some scientists said.
"I now estimate that there is an approximately 95% chance that 2024 beats 2023 to be the warmest year since global surface temperature records began in the mid-1800s," said Zeke Hausfather, a research scientist at US non-profit Berkeley Earth.
The changed climate has already unleashed disastrous consequences around the world in 2024. More than 1,000 people died in fierce heat during the haj pilgrimage last month. Heat deaths were recorded in New Dehli, which endured an unprecedentedly long heatwave, and amongst Greek tourists.
Friederike Otto, a climate scientist at Imperial College London's Grantham Institute, said there was a "high chance" 2024 would rank as the hottest year on record.