This year, the world experienced its second-warmest month of May since records began, the European Union’s Copernicus Climate Change Service (C3S) has said in a monthly bulletin.
Global surface temperatures last month averaged 1.4 degrees Celsius (2.5 degrees Fahrenheit) higher than in the 1850-1900 pre-industrial period, when humans began burning fossil fuels on an industrial scale, C3S said.
The latest data comes amid mixed momentum on climate action globally, with China and the EU reducing emissions as the Trump administration and technology companies increase their use of fossil fuels.
“Temperatures were most above average over western Antarctica, a large area of the Middle East and western Asia, northeastern Russia, and northern Canada,” the C3S bulletin added.
At 1.4C above pre-industrial levels, May was also the first month globally not to go over 1.5C (2.7F) in warming in 22 months.
“May 2025 breaks an unprecedentedly long sequence of months over 1.5C above pre-industrial,” said Carlo Buontempo, director of C3S.
“Whilst this may offer a brief respite for the planet, we do expect the 1.5C threshold to be exceeded again in the near future due to the continued warming of the climate system,” Buontempo said.
The increased temperatures were particularly felt in Pakistan’s Jacobabad city in Sindh province, where residents grappled with extreme temperatures in the high 40s, which sometimes reached 50C (122 F).
The soaring temperatures followed another heatwave last June that killed more than 560 people in southern Pakistan.
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