The patrons of Cilavegna are Saints Peter and Paul, celebrated on 29 June in the Parish Church of Santi Pietro e Paolo Apostoli.
Since 1964, the Pink Asparagus Festival has been held annually. The Shrine of Sant'Anna, being dedicated to Saint Anne, is the only non-Marian place of worship in all of Lomellina, and is an important religious reference point for the town, tied to an ancient tradition lasting over three hundred years. The town also holds the Castello di Cilavegna.