| Region | Typical Onset Date | Typical Withdrawal Date | | :--- | :--- | :--- | | | June 1 | Mid-September | | Mumbai (West coast) | June 10-15 | Early October | | Delhi (North) | June 25-30 | Late September | | Kolkata (East) | June 5-10 | Mid-October | | Chennai (Southeast coast) | June 1-5 | Mid-December (due to NE Monsoon) |