Global average temperature in January 2025 is all set to be the highest for January month, according to ERA5 data from the Copernicus Climate Change Service (C3S) up to January 28. While the data for January 28 is preliminary and January has three more days after that, it is unlikely that the broad trend will change significantly by the end of the month. This means that January 2025 will likely be the fourth January month when warming relative to the pre-industrial average is at least 1.5°C, the long-term warming threshold set by the 2015 Paris Agreement to avoid catastrophic climate change.

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