A high‐quality daily runoff time series of the Lake Como inflow and outflow, the longest for Italian Alps, was reconstructed for the 1845–2016 period in the Adda river basin. It was compared with contemporary monthly precipitation and temperature observations and estimated potential evapotranspiration losses. Trend analyses were conducted for daily flow maxima and 7‐day duration minima of inflows into the lake showing a non‐si...

The 1800–2016 monthly precipitation record for the upper Adda river basin is presented. It is computed by applying the anomaly method to a quality‐checked and homogenized observation database. The reconstruction accuracy and its evolution over the study period is evaluated at both station and grid‐cell levels. The anomaly‐based interpolation provides rather robust estimates even for the early years of sparse station coverage w...