Copernicus Bericht 2025, 14.1.2026 (engl. Original)
2025 ranks as the third-warmest year on record, following the unprecedented temperatures observed in 2023 and 2024. It was marginally cooler than 2023, while 2024 remains the warmest year on record and the first year with an average temperature clearly exceeding 1.5°C above the pre‑industrial level. 2025 saw exceptional near‑surface air and sea surface temperatures, extreme events, including floods, heatwaves and wildfires. Preliminary data indicate that greenhouse gas concentrations continued to increase in 2025.
Nearly half of the globe (48%) experienced much warmer than average annual temperatures (above the 90th percentile of the 1991–2020 climatology4 ). Annual temperatures were the warmest over 9% of the Earth’s surface relative to all years since 1979 in the ERA5 dataset. These proportions were 63% (much warmer than average) and 31%5 (warmest), respectively, in 2024. While temperatures were less extreme in 2025 than in 2024, these figures highlight the persistence of widespread warmth across the globe in 2025.
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