Overview

• April 2025 was 1.51°C above pre-industrial levels, making it the second-hottest April on record, according to Copernicus Climate Change Service.
• The 12-month period from May 2024 to April 2025 averaged 1.58°C above pre-industrial levels, highlighting sustained global warming.
• Sea surface temperatures outside polar regions averaged 20.89°C in April, the second-highest for the month, with notable warming in the North Atlantic and Mediterranean.
• Arctic and Antarctic sea ice extents in April were 3% and 10% below average, respectively, ranking among the lowest recorded for the month.
• Scientists emphasize the urgent need for climate action as projections suggest a permanent breach of the 1.5°C threshold by mid-2029 or sooner.