I lived in Mumbai for nearly 22 years of my life. I loved it for 8 months of the year. I hated June, July, August, and September. Those are the monsoon months. It rains in Mumbai only during these four months. These rains provide much needed relief from the hot summer and it refills the reservoirs that supply water to Mumbai.
But June is the months when the schools reopen for the new year and travelling in Mumbai during these four months is simply a horror.
Some pictures to ponder if your travel agent is booking you a trip to Mumbai during these months.