The official monsoon season runs for a 122-day period from June 1 to September 30, of which the peak rainfall period is July and August.

The monsoon advances northwards from Kerala, usually in surges, covering the entire country around July 15 | India News

The delayed monsoon is set to arrive in Kerala on June 4, bringing widespread rainfall, with very heavy downpours expected across southern states in the coming week.

India's monsoon season starts with a 55% rainfall deficit; onset expected in Kerala on June 4, says IMD.

KOCHI: India meteorological department (IMD) said southwest monsoon was likely to set over Kerala by June 4.