January 2025 was the warmest January on record
January 2025 was the warmest January on record, despite the presence of La Niña, a climate pattern that typically brings cooler global temperatures. According to the Copernicus Climate Change Service (C3S), the global average temperature for January 2025 was 13.23°C, which is 0.09°C warmer than the previous record set in January 2024 and 0.79°C above the 1991-2020 average.
This record-breaking warmth comes on the heels of 2024 being the hottest year on record, with global average temperatures rising 1.5°C above pre-industrial levels for the first time. Scientists have noted that global temperatures have stayed above the 1.5-degree mark for 18 of the last 19 months.
Despite La Niña’s cooling effect, ocean temperatures in the eastern Pacific remained above normal, suggesting that the shift toward La Niña may be slowing or stalling. The Arctic also experienced unusually high temperatures, with parts of the Canadian Arctic seeing temperatures 30°C (54°F) warmer than average.