January 2025 was the hottest on record—a whole 1.7°C above pre-industrial levels. If many climate-watchers expected the world to cool slightly this year thanks to the natural "La Niña" phenomena, the climate itself didn't seem to get the memo.

The past two years have seen month after month become the planet's hottest recorded. Climate scientists say human-produced greenhouse gases account for the majority of the warming.

The European climate service Copernicus says the world warmed to yet another monthly heat record in January, despite an abnormally chilly United States, a cooling La Nina and predictions of a slightly

Despite an emerging La Nina bringing cooler conditions to the tropical Pacific, last month has been deemed the warmest January on record.