This paper will assess the extent of urban growth of Kolkata over the years, characterize its future growth pattern, and determine its influence on pre-monsoonal precipitation. The first objective is to conduct an analysis using historical maps and satellite images to delineate the extent of urban growth, highlighting the factors which led to this population explosion. We will investigate whether trends in pre-monsoonal rainfall over the last 100 years are correlated with urban growth. The second objective is to determine the growth of Kolkata in the next 25 years, using the urban growth model, SLEUTH. The third and final objective is to see if there is any anomaly in the rainfall pattern, in and around Kolkata, under pre-, current, and 2025 urban land cover scenarios using the WRF-NOAH mesoscale model.