These data originate from the stations of the DWD as well as legally and qualitatively equivalent partner networks. Up to and including the complete previous year of the edition date, the data have finally passed through quality control and have been versioned. For more recent data, quality control has not yet been completed. All times are in UTC. According to the SYNOP convention, the hour hh denotes the measurement of hh-10min (so UTC11 denotes the time UTC10:50).

This dataset is a subset from the regional reanalysis COSMO-REA6, which is based on COSMO-EU model version 4.25. The calculations were performed within the HErZ project at University of Bonn (up to 2014) and extended afterwards by DWD until the dataset was finished in August 2019.