September 2025 Was the Third-Warmest on Record

Global temperatures stayed exceptionally high, averaging 16.11°C, about 1.47°C above the pre-industrial baseline, amid persistent ocean heat and widespread anomalies, Copernicus says.

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September 2025 ranked as the third-warmest September ever observed, according to the EU’s Copernicus Climate Change Service (C3S). Much like July and August, the month trailed only the record set in 2023 and the second-place mark in 2024. Copernicus puts the global mean at 16.11°C, which is roughly 1.47°C warmer than the 1850-1900 average used as a pre-industrial reference.

The broader picture, Copernicus climate specialist Samantha Burgess noted, remains unchanged: temperatures on land and at the ocean surface continue to run persistently high, reflecting the ongoing influence of elevated greenhouse-gas concentrations in the atmosphere. Against that backdrop, Europe saw pronounced warmth in several regions, particularly across the Nordic countries and Eastern Europe from the Baltic states down to the Balkans. Beyond Europe, notable positive anomalies were recorded in Canada, parts of Greenland, northwestern Siberia and adjacent coasts, as well as across extensive areas of Antarctica.

Rainfall patterns were similarly uneven. Copernicus reported abundant precipitation in parts of Scandinavia, Italy, Croatia and Spain, and along the eastern shores of the Black Sea. By contrast, large swaths of the Americas -including Canada, the United States, Mexico, Brazil and Uruguay- experienced a markedly drier month, as did Asian Russia and northern sections of the Indian subcontinent.

The findings come from Copernicus’s monthly global climate bulletin, which blends satellite observations, ground-based measurements and model analyses. With records spanning roughly 85 years, the programme provides a consistent basis for tracking how temperatures and precipitation are evolving worldwide - month after month, and increasingly, year after record-setting year.

 

Sources: AMNA, AFP

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