Mumbai Sees Heaviest Rain in 107 Years as Monsoon Arrives 16 Days Early

Breaking a 1918 record, Mumbai received 295 mm rainfall on the first day of the earliest monsoon in 75 years.

May 26, 2025: Mumbai witnessed an extraordinary weather event on Monday as the city recorded its highest rainfall in 107 years on the very first day of monsoon 2025. According to the India Meteorological Department (IMD), Mumbai has officially welcomed the monsoon 16 days earlier than usual — marking the earliest onset of the season in 75 years.

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The Colaba observatory, the city’s key weather station, recorded a staggering 295 mm of rainfall, breaking a 1918 record of 279.4 mm. Meanwhile, other parts of Mumbai also received substantial rainfall: Santacruz (55 mm), Bandra (68.5 mm), Juhu Airport (63.5 mm), Chembur (38.5 mm), Vikhroli (37.5 mm), Mahalaxmi (33.5 mm), and Sion (53.5 mm) between 8:30 am and 11 am.

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The IMD confirmed that the southwest monsoon advanced into Mumbai on May 26, much ahead of its usual June 11 arrival date. IMD scientist Sushma Nair described it as the “earliest onset in 75 years.”

Heavy rain and waterlogging caused significant disruption in the city, with visuals showing pedestrians wading through inundated roads. The IMD upgraded its alert for Mumbai, Thane, Raigad, and Ratnagiri from orange to red, cautioning residents of continued heavy rainfall.

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The early arrival of the monsoon was part of a broader pattern, with IMD stating that it has advanced over several parts of central Arabian Sea, Maharashtra, Karnataka, Telangana, Andhra Pradesh, parts of the Bay of Bengal, and northeastern states.

As the southwest monsoon sweeps in, the city is bracing for continued wet spells and heavy showers through the coming days.

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Mumbai rains, monsoon 2025, record rainfall, IMD, Colaba observatory, earliest monsoon, waterlogging, weather update, Mumbai monsoon