EnvironmentSeptember 2026 was the second-hottest on record as El Nino keeps strengthening
Copernicus says September 2026 averaged 16.27 C globally, 1.63 C above pre-industrial levels, the second month in a row above 1.5 C, while sea surface temperatures set a record and the Nino 3.4 region hit an all-time high of 29.70 C.