Kolkata Awaits Onset Of Monsoon; Rain Revival Likely by Mid Next Week
Jun 4, 2025, 3:00 PM | Skymet Weather Team
The southwest monsoon arrived early this season over mainland Kerala and Northeast India simultaneously. The eastern branch of the monsoon covered all of Northeast India well before time and reached Sikkim and Sub-Himalayan West Bengal on 29th May 2025. However, the northern limit of monsoon (NLM) has been stuck thereafter. The normal dates for the monsoon to cover West Bengal lie between 10th and 15th June.
Under normal conditions, the southwest monsoon arrives over Mumbai and Kolkata simultaneously, the scheduled dates being 11th and 10th June, respectively. The monsoon arrived earlier than ever over Mumbai on 26th May 2025. Yes, it has been stuck there till today and has not inched further along the West Coast.
On the eastern side, the monsoon has covered most of Bangladesh, Sikkim, and Sub-Himalayan West Bengal. The NLM has reached just on the outskirts of Gangetic West Bengal. A little push and it will reach the capital city, Kolkata.
There have been moderate showers over the city of Kolkata and suburbs in the past 24 hours. Both official observatories of Kolkata, Alipur and Dumdum, have recorded 38mm and 7 mm of rainfall, respectively. Midnapur, Bankura, Malda, Howrah, and Hooghly have also registered light to moderate rainfall in the past 24 hours.
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These showers may be taken as part of pre-monsoon activity before the arrival of the monsoon. However, if these showers are not considered a ‘monsoon call’ now, then possibly, the city may have to wait for about a week or even more for the formal arrival of the monsoon.
A monsoon system is likely to form over the Bay of Bengal sometime next week. Cyclonic circulation over the west-central Bay of Bengal will form around 10th June 2025. This is likely to become more marked as a monsoon low/depression follows. The system may move inland on 12th June or so. The presence and movement of the system will bring in favourable conditions for the advancement of the monsoon over the city and surrounding area. Even in this scenario, the monsoon will be just on time for the city.
