- September 8, 1995 - Anthropologist Johan Reinhard discovers the mummy Juanita near the summit of the volcano Ampato.
- September 12, 1982 - The FIVB Women's World Championship Volleyball started in Lima.
- September 15, 2007 - The Carancas impact event occurred when a large chondritic meteorite crashed near the village of Carancas.
- September 23, 1821 - The National Anthem was first performed publicly in the Theater of Lima after a contest issued earlier that year by José de San Martín.