Average annual days with measurable rain across ~7,900 comuni, from Copernicus Climate Data Store (ERA5-Land). Pan and zoom the map, or search a place to see its figure and open its full profile.
How it’s built. Mean number of 'wet days' per year, averaged across 2015-2024 — a wet day is the WMO's own definition (a day with 1.0mm of precipitation or more, WMO-No. 8 Guide to Instruments and Methods of Observation), not a cutoff picked for this site. Same source, method and UTC-day-boundary note as the rainfall-total layer above.