The world set yet another monthly heat record in January, despite an abnormally chilly U.S., a cooling La Nina​​ and predictions of a slightly less hot 2025, the European climate service Copernicus says.

"January 2025 is another surprising month, continuing the record temperatures observed throughout the last two years, despite the development of La Niña conditions in the tropical Pacific and their temporary cooling effect on global temperatures," said Samantha Burgess of the Copernicus Climate Change Service.

Earth’s prolonged streak of abnormal heat continued into 2025 despite the arrival of La Niña ocean conditions, which typically bring cooler temperatures.