The Southwest Monsoon reached Kerala on May 24, 2025 — one of the earliest arrivals in over a decade. Learn what caused this early onset and its impact on agriculture, cities, and water security. In 2025 , the southwest monsoon arrived over Kerala on May 24, the earliest since 2009, beating the usual June 1 onset. The India Meteorological Department (IMD) confirmed the onset based on specific rainfall, wind, and satellite criteria. IMD predicts above normal monsoon rainfall for India in 2025 , with a probability of 59%. It also reports neutral ENSO and IOD conditions, and a possible impact of Eurasian snow cover on monsoon . Private weather agency Skymet has released its first official forecast for the 2025 southwest monsoon , predicting ‘normal’ rainfall at 103% of the Long Period Average (LPA). What is Monsoon ? The term monsoon refers to a seasonal reversal of winds, typically associated with heavy rainfall. In India, the Southwest Monsoon (June–September) is the main rainy season, contributing 80–90% of the country’s annual rainfall. Onset & Progress of Monsoon The monsoon starts in Kerala around ...
