The salient feature of this study is the application of Factor Analysis, K-means clustering and GIS (Geographical Information System) Map as data mining tools to explore the hidden pattern present in the dataset for each of the study periods. Factor analysis is applied first and the factor scores of extracted factors are used to find initial groups by k-means clustering algorithm. Finally, data mining tools are applied and the groups are identified as rainfall belonging to HR (High Rainfall), MR (Moderate Rainfall) and LR (Low Rainfall). The results of the present study indicate that Data Mining Tools can be used as a feasible tool for the analysis of large set of rainfall data.