The patron saint of Lentate sul Seveso is Saint Vitus, celebrated on the Monday following the third Sunday of October in the Church of San Vito.
On 26 July, the town festival is held: local tradition divides the town into four districts, piazza, laghetto, camporia and borghetto, which compete in various contests. The main feast linked to Saint Maurus, on 15 January, is instead celebrated on the nearest Sunday. The municipal territory also holds the Oratory of Mocchirolo and Villa Valdettaro.