Career
He was born in Saint-Pierre-les-Becquets, Canada East, the son of Jean-Baptiste Monfet and Rosalie Gagnon. Monfette was a justice of the peace and owned a farm at Sainte-Sophie-de-Lévrard. Monfette was married twice: to Elmire Tousignant in 1866 and to Célina Legendre (née Pépin) in 1901.
He was mayor of Sainte-Sophie-de-Lévrard from 1882 to 1890, from 1896 to 1901 and from 1910 to 1913.
He died in Sainte-Sophie-de-Lévrard at the age of 82.