Between October 2024 and September 2025, temperatures were measured at 1.60 degrees above the average for the years 1991–2020, according to an annual report by NOAA, which is based on data stretching back to 1900.
Co-author Tom Ballinger of the University of Alaska says it is “very alarming” to see such rapid warming in such a short period of time. He called the development “unprecedented in recent times and perhaps thousands of years ago.”
The past year has seen the Arctic's warmest autumn, second warmest winter and third warmest summer since 1900, according to the report.
