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Mumbai Rains in September 2025: Spurred by heavy showers throughout recent weeks, Mumbai has already recorded 606 mm of rainfall this month, making it the city’s wettest September since 2021. Following torrential rain over the weekend, the showers are slated to recede gradually with the India Meteorological Department (IMD) sounding an orange alert in the city on Monday.
Amid a red alert sounded in the region, several pockets of Mumbai received over 100 mm of rainfall between Sunday and Monday morning. Records from the weather bureau showed that in the 24 hours till 8.30 am on Monday, the IMD’S Colaba coastal observatory registered 101.2 mm of rainfall while the Santacruz observatory received 77.5 mm.
According to the Brihanmumbai Municipal Corporation’s (BMC) automatic weather stations, the heaviest downpour was recorded in the western suburbs at an average of 99.44 mm of rainfall, followed by an average of 80 mm in the eastern suburbs, and 74 mm in the island city division.
Owing to the heavy showers over the weekend, preceded by intermittent spells of heavy rainfall throughout the month, Mumbai has until Monday (September 29) reported 606.1 mm of rainfall this month. Prior to this, the wettest September was recorded in 2021 when the city received 744.2 mm of rainfall during the month.
Overall, the Santacruz weather station in the city has received 3,100.4 mm of rainfall since June, as per data collected till Monday morning. Officials said that this marks a positive departure of over 787 mm above the normal. Meanwhile, the Colaba station has received 2,245 mm of rainfall so far, which is a positive departure of 155 mm above the normal, they added.
This comes a day after the city’s Colaba station clocked the second highest single-day rainfall figure in the area since 2021, receiving over 120 mm of rainfall in a 24-hour period.
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