The World Meteorological Organization (WMO) has confirmed that 2025 has entered the top three warmest years in the history of instrumental observations, continuing the steady trend of global warming. According to the WMO, the last eleven years (2015-2025) have become the warmest in the entire observation period, while the temperature of the world's oceans continues to rise.
According to the results of a combined analysis of eight global climate data sets, the average global surface temperature in 2025 exceeded the pre-industrial level (1850-1900) by 1.44 °C (with a marginal uncertainty of ±0.13 °C). In two datasets, 2025 ranked second among the warmest years in the 176-year history of observations, and in the other six it ranked third. The last three years — from 2023 to 2025 — have been recognized as the warmest in all eight datasets, and the average temperature during this period exceeded the pre-industrial level by 1.48 °C.
The WMO notes that despite the fact that 2025 began and ended with the cooling climate phenomenon La Niña, it still turned out to be one of the warmest years in history due to the continued accumulation of greenhouse gases in the atmosphere. Elevated land and ocean temperatures have contributed to an increase in the number and intensity of extreme weather events, including heat waves, heavy rainfall, and tropical cyclones, underscoring the importance of developing and improving early warning systems. The WMO also highlights the key role of global climate monitoring and the exchange of reliable hydrometeorological information to make timely and effective decisions.
