Heavy Rainfall Twice in 12 Days, 2025 July Poised to Break Rain Records
Kolkata has witnessed such consistent heavy rainfall in July after many years. On July 7th, 89.6 mm, and on July 19th, 84 mm – with 42.3 mm of rainfall also recorded on July 15th in between these two days. In total, the city recorded 219.9 mm of rainfall in just three days. According to weather experts, such frequent rainfall in a short period indicates a significant shift in climate patterns.
Changing Monsoon Rhythm: Heavy Rainfall Twice in One Month in Kolkata, Instead of Once a Year
According to data from the Indian Institute of Tropical Meteorology (IITM), Pune, Kolkata has experienced heavy rainfall once every monsoon season for the past four years. However, this year has been an exception to that rule. The monsoon is only halfway through, yet the city has already witnessed ‘heavy rainfall’ twice. Experts say this is a new trend in the monsoon, linked to the effects of climate change.
Rain Forecast Indicates More to Come, New Low-Pressure Area Forming!
The Alipore Meteorological Department reports that a new low-pressure area is very likely to form over the Bay of Bengal by July 24th. Simultaneously, the monsoon axis currently extends from Rajasthan through Fatehgarh, Muzaffarpur, Bankura, and Contai, directly into the Bay of Bengal. Another axis extends from the northern part of Bihar through Jharkhand to Odisha. The Meteorological Department indicates that rainfall may increase again due to the combined effect of these three systems.
Monsoon Still 'On the Go' in Kolkata, Significantly Higher Than Normal Rainfall Expected
IITM data shows that the average rainfall in Kolkata during July is approximately 371.6 mm. In July 2025, the city has already received 353 mm of rain, a large portion of which fell in just three days. If the low-pressure area becomes active next week and heavy rainfall occurs again, this July will be significantly wetter than normal.
Heavy Rainfall May Start Again from July 23rd, South Bengal Should Prepare
Meteorologists report that there is a possibility of heavy rainfall again in many districts of South Bengal from Wednesday, July 23rd. This rainfall could take an extreme form for Kolkata, along with Hooghly, Howrah, North and South 24 Parganas, East and West Medinipur, and some other districts in the south. Experts also warn of the possibility of waterlogging, traffic jams, and disruptions to civic services.
When the Monsoon Oscillates Between Blessing and Curse—Is the City Prepared?
While the impact of rain can be positive for agriculture, excessive rainfall can lead to disruptions in the city's drainage, transportation, and normal public life. According to the Meteorological Department's forecast, with the possibility of more heavy rain ahead, the administration and citizens must be jointly vigilant and prepared. Otherwise, the frequent low-pressure systems could create a new chapter of civic suffering.
