Programmatic interface to the European Centre for Medium-Range Weather Forecasts dataset web services (ECMWF; < https://www.ecmwf.int/>) and Copernicus's Data Stores. Allows for easy downloads of weather forecasts and climate reanalysis data in R. Data stores covered include the Climate Data Store (CDS; < https://cds.climate.copernicus.eu>), Atmosphere Data Store (ADS; < https://ads.atmosphere.copernicus.eu>) and Early Warning Data Store (CEMS; < https://ewds.climate.copernicus.eu>).