This project hosts SWE data over the Po River District. For more information about the data and its usage, please refer to the corresponding data paper, which is submitted to the Scientific Data Journal. This spatial dataset is distributed as daily over a period of 30 years from 1991 to 2021, beginning on October 3rd of each year up to July 1th of next year. The data is distributed in GeoTIFF format with a spatial resolution of 500 m by 500 m. The data is organised into folders labelled with corresponding years, such as, “1991_1992”, which means within the particular folder, there are for example the data from October 3, 1991 to July 1, 1992 and so on for the subsequent years. Moreover, each daily data file follows a consistent naming convention, such as SWE on October 3, 1991 is named as “SWE_1991-10-03.tif”.The data is being distributed as a georeferenced temporal raster data and therefore, can be processed and visualised using any GIS; furthermore, any programming language with GIS capabilities can be used to analyse and visualise the data