September 01-08: Annual Feast, Manarkadu St. Mary’s Church, Kottayam
On the last three days of the festival, processions of thousands of devotees carrying golden crosses and colourful umbrellas are held.
(Every year Sept.01-08)

September 02: Athachamayam: Events to mark the beginning of the Onam festival on the Atham day of the Malayalam month Chingam, at Tripunithura, Kochi.

Highlights: Spectacular procession of caparisoned elephants; Colourful floats; Musical ensembles; Performance of art forms like Theyyam, Panchavadyam, Chendamelam, Pambamelam, Karakattam, Mayilattam, Kolkali, Ammankudam, Attakavadi, Pulikali, Kaduvakali, Parichamuttukali.
September 12: Onam: This is the harvest festival of Kerala. Celebrations are held for ten days, beginning with the Atham day of the Malayalam month Chingam.
Highlights:: Floral decorations; Elephant processions; Classical and folk dance performances; Classical and folk music recitals; Cultural pageants; Water carnivals.

September 14: Payippad Jalotsavam, Alappuzha : This three-day annual fiesta on the Payippad Lake, 35 km from Alappuzha, commemorates the installation of the deity at the Subrahmanya Swamy Temple, Harippad. 

Highlights: : Spectacular water pageants; Water floats; Decorated boats; Performing arts; Vanchipattu.

September 15: Pulikali, Thrissur:A popular folk art performed during Onam, in Pulikali a group of performers paint their whole body like tigers and prance around, accompanied by a hunter and a drummer. The theme of the play is tiger hunting. The Swaraj Round in Thrissur district is the venue of Pulikali. 

September 16: Aranmula Vallomkali, Pathanamthitta ;This traditional boat race conducted at Sree Parthasarathy Temple, Aranmula in connection with the Onam celebrations is more of a water fiesta with a variety of decorated row-boats parading through the river, to the accompaniment of Vanchipattu. In each boat, besides the rowers, singers and ruddersmen are included. Every boat is decorated and thess occupants carry ornamental umbrellas. (Sept.06)

September 28: Padayani festival, Neelamperoor, Kottayam : (Sept. 18)

Second week of October: Koratty Muthy’s Feast, St. Mary’s Church, Koratty, Thrissur : : (7 km to the south of chalakudy) Devotees from far and wide visit the church on the day of the feast, the highlight of which is an agricultural fair. As Koratty is predominantly an agricultural village, the people here attach great importance to this festival.
(Every year second week of Oct.)