The India Meteorological Department (IMD) has announced that the southwest monsoon is likely to reach Kerala earlier than usual this year, possibly by May 27, which would be the earliest onset since 2009. Normally, the monsoon arrives in Kerala around June 1.
Typically, the monsoon enters Kerala in the first week of June and covers the entire country by July. It starts to withdraw from northwest India around mid-September and usually ends by mid-October.
Monsoon Onset in Previous Years (Kerala):
According to IMD, an early or late onset of the monsoon in Kerala doesn’t directly affect the total rainfall across the country. Rainfall each year depends on global and local climate patterns.
Above Normal Rainfall Expected in 2025: IMD has forecasted that India could receive above-normal rainfall during the monsoon season this year (June to September). The El Niño weather pattern, which usually reduces rainfall, is not expected to affect India in 2025. The total rainfall could be around 105% of the long-period average of 87 cm.
How IMD Measures Rainfall:
IMD compares yearly rainfall with the 50-year average (87 cm). Rainfall is classified as:
This classification helps in planning for agriculture, water storage, and disaster management.
Why Monsoon Matters for India: The monsoon is crucial for India’s agriculture, which supports about 42% of the population. It is also essential for replenishing water reservoirs and ensuring drinking water and electricity supply across the country.
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