August tied as the hottest month ever recorded globally, matching the record set in July 2023 at 16.96C, according to the European Union’s Copernicus Climate Change Service. The milestone caps a historic global heatwave driven by fossil fuel emissions and a strengthening El Nino weather pattern.
Global temperature records continued to tumble as European climate monitors confirmed that August tied for the hottest single month in modern history. The Copernicus Climate Change Service reported that average air temperatures last month reached 16.96C, matching the previous all-time monthly high established in July 2023. Because the difference between the two periods was a mere 0.01C, researchers consider them joint-highest in a observational dataset that stretches back to 1940.
The persistent heat left an unmistakable mark across the globe, driving extreme weather from land to sea. August was a remarkable month in the global climate record
, said Samantha Burgess, strategic lead for climate at Copernicus, noting that the resulting impacts were increasingly being felt by communities, economies and ecosystems across the world
.
Oceans Heat Up Under El Nino and Fossil Fuel Pressures
Marine environments absorbed the brunt of the planetary warming trend. Global sea surface temperatures set a new daily high and tied for the hottest August on record, extending an ongoing three-month streak of unprecedented ocean warmth. According to scientific assessments, more than 90 percent of the excess heat trapped by greenhouse gases has been absorbed by the world’s oceans, sparing landmasses from even worse atmospheric spikes while inflicting severe damage on marine life, coral reefs, and coastal communities.
Overheated basins such as the Atlantic and Mediterranean shattered records alongside the tropical Pacific. In the Pacific, a powerful El Nino climate pattern is rapidly gathering strength. El Nino events release vast amounts of stored ocean heat into the atmosphere, temporarily nudging global temperatures upward and increasing the likelihood of extreme weather events thousands of miles away, from droughts in Africa to floods in Peru and wildfires in Australia.
Researchers warn that the current El Nino is still strengthening and could become one of the most powerful on record. El Nino approaches peak intensity around December and for 2027 — and maybe even 2026 — to become the hottest years ever observed
, noted a climate scientist from Imperial College London, who added that human activity has warmed the planet by roughly 1.4C since pre-industrial times.
Western Europe Concludes Its Warmest Summer on Record
On land, western Europe’s warmest summer surpassed the long-standing record set in 2003. The June-to-August season featured severe, back-to-back heatwaves that dried up rivers, forced school closures, and primed rural landscapes for devastating wildfires.
European monitoring platforms estimated that more than 32,000 excess deaths occurred across the continent between mid-July and mid-August. Researchers from the World Weather Attribution network concluded that a particularly intense heatwave in June would have been virtually impossible
without the influence of human-induced climate change.
Extreme conditions extended far beyond Europe. The National Oceanic and Atmospheric Administration reported that the contiguous United States also endured its hottest summer on record. Meanwhile, regions home to approximately 900 million people lived through the hottest July ever observed.
United Nations Warns of Uncharted Territory Ahead
While instrumental records date back to 1940, proxy data sources including ice cores, tree rings, and coral skeletons provide a much deeper historical baseline. Scientists assert that modern temperature levels are unprecedented in human experience. Samantha Burgess from the European Centre for Medium-Range Weather Forecasts, which oversees Copernicus, noted that humans haven’t seen temperatures as hot as today for, arguably, at least the last 100,000 years
.
“The evidence is irrefutable: this is the spiralling price of humanity’s fossil fuel addiction, and the global climate crisis it is fuelling.”
Simon Stiell, UN climate chief
United Nations officials stressed that humanity’s reliance on fossil fuels remains the primary driver of these recurring records. As heat-trapping greenhouse gas emissions reached new highs, international monitors warned that the planet will continue to push into uncharted territory until global emissions are reined in.
We’ve had an exceptional summer — not only in Europe, but other parts of the world where records that have existed for close to a century have fallen
, Burgess said, emphasizing that conditions will continue to worsen unless we turn off the tap to global emissions
.