The European Centre for Medium-Range Weather Forecasts announces that: “From today (7 October 2020), hundreds of graphical products ECMWF forecast charts will become free and accessible to all! Medium-range, extended-range and long-range forecast charts of temperature, wind, precipitation, clouds and ocean waves are just some of the products available.”

“Making these hundreds of charts free and open means that, not only is there no charge for the information, but users can also share, redistribute and adapt the information as they require, even for commercial applications, as long as they acknowledge the source as ECMWF. The charts are available under the Creative Commons licence (CC-BY 4.0)”.

link:
https://ecmwf.int/en/about/media-centre/news/2020/ecmwf-moves-towards-policy-open-data