The Copernicus Climate Change Service (C3S), implemented by the European Center for Medium-Range Weather Forecasts on behalf of the European Commission with EU funding, regularly publishes monthly climate bulletins reporting changes observed in global air and sea surface temperatures, sea ice cover and hydrological variables. The bulletin also contains the most important events related to the boreal summer (June-July-August). Most of the reported findings are based on the ERA5 reanalysis dataset, which uses billions of measurements from satellites, ships, aircraft and weather stations around the world. (More on climate.copernicus.eu)