Southwest Monsoon after remaining stuck for nine days on the West Coast, Monsoon has finally reached Mumbai and Konkan and adjoining areas. However, on the eastern side, Monsoon remains stagnant and hasn't moved even a bit in the past ten days.
This is how Kolkata is still not receiving Monsoon rains so far. The usual date of Monsoon for Kolkata is June 11, but it has still not made its onset over the capital city of West Bengal.
Presently, there are conditions building up for some rains over Gangetic West Bengal, after which Monsoon will follow suite. We can expect Southwest Monsoon to advance over Kolkata around June 16 and 17.