The World Meteorological Organization (WMO) report warns that global temperatures in 2025 will be among the highest ever recorded, signalling deepening climate risks and challenging global efforts to limit warming to 1.5°C under the Paris Agreement

This year is projected to rank among the three hottest on record, with global temperatures reaching levels that the United Nations (UN) says threaten irreversible environmental damage. According to a report by the World Meteorological Organization (WMO), released ahead of next week’s COP30 climate summit in Brazil, the years 2023, 2024, and 2025 are set to be the hottest in 176 years of record keeping.

The report highlights that concentrations of greenhouse gases have reached new highs, further trapping heat and intensifying the climate crisis. The past 11 years, from 2015 to 2025, have each been the warmest on record, showing a sustained rise in global temperatures.

The WMO notes that, given current trends, it will be virtually impossible to limit global warming to 1.5 degrees Celsius in the coming years, the key target set under the 2015 Paris Agreement. The legally binding accord sought to guide countries away from fossil fuel dependency and to keep temperature increases well below 2 degrees Celsius above pre-industrial levels.

The UN described the world’s inability to curb rising temperatures as a moral failure, warning that without stronger action, global heating could cause severe and long-term harm to ecosystems and human life.