European Union's Copernicus Climate Change Service

October 2023: The Planet's Hottest Month Ever Recorded

In a stunning anomaly, October 2023 has been declared the hottest October on record, according to the European Union's Copernicus Climate Change Service (C3S). The month surpassed the previous temperature record set in October 2019 by a remarkable margin, with an average surface air temperature of 15.3°C—0.85°C above the 1991-2020 October average and 0.4°C higher than October 2019.