The Last 3 Years Were the Earth’s Hottest on Record
By Carolyn Gramling / ScienceNews / January 13, 2026
The last three years were the hottest on record, a new analysis of global climate data finds. They also mark the first three-year period in which the global average temperature exceeded 1.5 degrees Celsius above preindustrial levels — a threshold associated with increased risks to biodiversity, human health and weather extremes.
“1.5 degrees C is not a cliff edge, but we know that every half a degree matters,” said climate scientist Samantha Burgess at a January 12 press event announcing the report. Burgess is the strategic climate lead for the European Centre for Medium-Range Weather Forecasts, or ECMWF, which released the report January 14.
Although 2025 was slightly cooler than the two previous years, averaging 1.47 degrees above preindustrial temperatures, Earth is warming faster than it was a decade ago. The planet is now on track to consistently exceed the 1.5-degree threshold by 2029.

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