The patron of Bertonico is San Clemente Papa, celebrated on the second Sunday of September; the village holds the Chiesa di San Clemente.
The municipality also holds the Chiesa di San Lorenzo Martire, the Cappella di San Rocco, the Oratorio di Sant'Antonio and the Ponte di Boccaserio. At the Arsenale dell'Ospedale Maggiore di Milano the art event Naturarte was held from 1998 to 2020, continuing with art exhibitions linked to nature themes.