2025 was one of the hottest years on record.

European climate data report 2025 as the third-warmest year, about 1.47°C above pre-industrial levels, and scientists link widespread extreme heat that year to human-caused greenhouse gas emissions.

Data coordinated by the European Centre for Medium-Range Weather Forecasts (ECMWF) and other organizations found 2025 ranked as the third-warmest year on record. ECMWF reported 2025 at about 1.47°C above the 1850–1900 pre-industrial reference. Scientists and reporting agencies discussed the year because its extreme heat affected multiple regions and was linked to human-caused greenhouse gas emissions. Analyses from several groups were used to compare years and examine regional impacts. Key facts: - ECMWF reported 2025 as roughly 1.47°C above the 1850–1900 average, placing it third behind 2024 and 2023. - Other organizations, including Berkeley Earth, reached similar rankings though exact decimal values differ. - Scientists linked the year’s extreme heat to human-caused climate change and noted regional impacts, including heatwaves, strained health services and a rapid analysis that associated the heat with more than 1,500 deaths. - La Niña was cited as a moderating influence in 2025 (though still described as unusually warm for a La Niña year), and forecasters indicate La Niña may shift toward neutral conditions soon. Summary: The reports show 2025 was among the warmest years on record and was associated with widespread extreme-heat events and documented health and infrastructure impacts in multiple regions. La Niña is identified as a factor that tempered global temperatures in 2025, and forecasts suggesting a move to neutral conditions leave the potential for different global temperature trends later this year.