Monsoon Start Update in India 2025: The India Meteorological Department (IMD) declared the monsoon onset over Kerala on Saturday (May 24), eight days ahead of its normal date schedule of June 1. The onset marks the beginning of the four-month, June-September southwest monsoon season over India, which brings more than 70 per cent of the country’s annual rainfall. This makes the date a significant event in India’s economic calendar.
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