seNorge observational gridded datasets. seNorge_2018, version 20.05

seNorge_2018 is an observational gridded dataset for daily aggregated temperatures and precipitation data over the Norwegian mainland. The time interval covered spans more than 60 years, from the 1st of January 1957 to the present day. Version 20.05 of the historical archive (1957-2019) is described in this document, with special emphasis on the variations in the methods with respect to the previous version of the archive, which is version 18.12.