2025 is poised to be the joint-second warmest year on record, alongside 2023, according to new data from the Copernicus Climate Change Service (C3S).
Both this year and 2023 sit behind 2024, however, which remains the warmest year in the C3S database, reported Sustainability Online.
November 2025 was the third-warmest on record, C3S noted, with average global surface air temperatures of 14.02°C, which is 0.65°C above the 1991–2020 baseline for November.
It was also 0.20°C cooler than the warmest November recorded to date, in 2023, as well as being 0.08°C cooler than November 2024.
‘This monthly climate update also reveals November 2025 was the third-warmest globally, with notably warmer-than-average temperatures recorded across Northern Canada and the Arctic Ocean,’ C3S said. ‘The month was marked by a number of extreme weather events, including tropical cyclones in Southeast Asia, causing widespread, catastrophic flooding and loss of life.’
With temperatures 1.54°C above pre-industrial levels, November 2025 was the second month this year, after October, to see temperatures exceed the 1.5°C threshold.
