What does the data show? This data shows the annual number of 10mm rainfall days (days where rainfall is equal to or greater than 10mm) averaged over the 1991-2020 period. The data is from the HadUK-Grid v.1.1.0.0 dataset and is provided on the 2km British National Grid (BNG).   What are the naming conventions and how do I explore the data? This data contains a field for the average over the period, named ‘Rainfall 10mm Days’.   To understand how to explore the data, see this page: https://climatedataportal.metoffice.gov.uk/pages/user-guide   Data source HadUK-Grid v1.1.0.0 (downloaded 11/03/2022)   Useful links Further information on HadUK-Grid Further information on understanding climate data within the Met Office Climate Data Portal