This was the second warmest September in history worldwide, according to Copernicus
The month of September 2023 has only exceeded the record, with the average sea surface temperature being the highest ever recorded (21.05 ° C).
This is the second warmest September since records have been recorded, after 2023, according to the latest report by the Copernicus Climate Change Service (C3S), which notes that average sea surface temperatures have broken records and reached their all-time high of 21.05 ° C.
The average air temperature on the Earth's surface has been 16.27 ° C globally, which is 0.82 ° C above normal value, and 0.11 ° C below September 2023. Compared to pre-industrial levels, this temperature has been 1.63 ° C. It is the second consecutive month in which this barrier passes (which has not happened since November 2025), and experts believe that this trend will continue at least until 2027.
There are other worrying facts: the average sea surface temperature of has been21.05 ° C , the highest ever recorded in September, surpassing the record record of 20.92 ° C in 2023.
Much of the tropical area of the Pacific Ocean has experienced extremely high temperatures as a result of the ElNiño phenomenon, and they even believe that these conditions will increase in the coming months.
In Europe, September 2026 has been the third warmest on the entire continent and the warmest in history in the western region. The average temperature in Europe has been 16.26 ° C, 1.54 ° C higher than usual. In Western Europe the average has been 2.51 ° C higher than normal.
On the other hand, thesea iceof Antarctica is decreasing, and by extension has been the third lowest in winter and also in September.