Indian economy is very sensitive to agronomics that is heavily depends on the monsoon rainfall. Hence a slight change in monsoon rainfall pattern affects the nation‘s GDP. Most of the regions in India receive more than 75% of their annual rainfall during the southwest monsoon season i.e., between June and September months. The knowledge of duration of this monsoon rain is very important for water management and urban planning. The major urban flooding events and their damages have been seen in Mumbai, Srinagar, Chennai, and Gujarat in recent years and in Kerala during the month of August 2018. In this regard, the average rain hours during the past three decades for 50%, 95% monsoon rainfall over different cities of India are studied using hourly rainfall dataset collected by the India Meteorological Department.