A new report by the World Meteorological Organization (WMO) on Wednesday, May 28, warned that there is a 70 per cent chance of global temperatures exceeding the 1.5°C threshold above pre-industrial levels between 2025 and 2029.
The warning comes at a time when 180 of the 195 UNFCCC countries have yet to submit their next round of nationally determined contributions (NDCs), or national climate plans, for 2031–35 before the 30th Conference of the Parties (COP30). Climate plans are crucial to limiting global temperature rise to 1.5°C.
The warning follows the European Union’s Earth Observation Programme, Copernicus Climate Change Service’s March forecast on the global average temperature breaching the 1.5°C long-term global warming threshold by September 2029 if the current trend continues.
The annually averaged global mean near-surface temperature for each year between 2025 and 2029 is predicted to be between 1.2°C and 1.9°C higher than the average over 1850–1900, the report titled WMO Global Annual to Decadal Climate Update (2025–2029) said, emphasising the need for continued climate monitoring to inform decision-making and adapt to the growing effects of climate change.
It also said that there is an 80 per cent chance that at least one of the next five years will surpass 2024 as the warmest on record. Although exceptionally unlikely, there is now also a 1 per cent chance of at least one year exceeding 2°C of warming within the next five years. However, long-term warming (averaged over decades) remains below 1.5°C.
