The data rainfall at the level of the trap of mill of princes on Scorff river collected for the Environmental Research Observatory (ERO) on Diadromous Fish in Coastal rivers (DiaPFC). ORE DiaPFC is a research infrastructure focused on studying the evolution of diadromous fish populations under the influence of human-induced and environmental changes (mainly agriculture and climate). Sampling is conducted at 5 sites spread along the mainstem, one since 1995 and others since 2005 and later. Scorff River: Latitude ranges from 47.7718 to 48.1682; longitude ranges from -3.2497 to -3.3404 and elevation range from 0 and 144 metres. The Scorff River is a small coastal river in southern Brittany (France). The main river is 78.6km long, including a 15km estuary. The mean gradient is 3.6%, annual mean discharge is 5m3/s and the drainage basin area has an area of 480km2. Agriculture is the main human activity and land use, with several areas of moors and forests. file with date and time of an automatic rain gauge switchover to 0.2 mm rainfall