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According to the World Meteorological Organization (WMO), 2025 is expected to be the second or third hottest year since records began. In addition, the concentration of greenhouse gases in the Earth’s atmosphere has risen by an unprecedented 2.3 percent.
“The alarming series of extraordinary temperatures has continued in 2025,” the WMO said Thursday when it presented the data ahead of the COP30 world climate conference in Belem, Brazil. According to the United Nations sub-organization, 2024 was the hottest year ever recorded.
With the data expected for 2025, the WMO says the decade-long trend of record global average temperatures will continue. All eleven years from 2015 to 2025 were among the hottest ever recorded since measurements began 176 years ago.
The WMO also reported that the concentration of greenhouse gases in the Earth’s atmosphere had risen by an unprecedented 2.3 percent. According to the report, India, the world’s most populous country, contributed the most to this development, followed by China, Russia, and Indonesia. The organization stated that this development suggests further heat records can be expected in the coming years.
Above-average temperatures until the end of August
WMO chief Celeste Saulo said that in light of this data, it would be “almost impossible” to limit the increase in global average temperature to the 1.5 degrees agreed upon by the international community compared to the pre-industrial era without “temporarily exceeding” it. According to WMO data, temperatures measured until the end of August were 1.42 degrees higher than the pre-industrial average.
At the same time, Saulo said scientific findings also made it clear that it was “still absolutely possible and essential” to bring global temperatures back to 1.5 degrees higher by the end of the century. The WMO also emphasized that there had been “significant progress” in setting up early warning systems for natural disasters. Since 2015, the number of countries with such systems has risen from 56 to 119. However, it is “urgently” necessary to equip the remaining countries with such systems, which are “more important than ever.”
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