The rainfall is the one of the fundamental physical parameter among the climate as for the development of society is concern and it determines the drought as well as the environmental factors for the particular region. The present study deals with the rainfall characteristics of the Kongu Upland, which includes the spatial distribution and variability through different seasons, and precipitation ratio. The study is based on 49 years of the monthly rainfall data for 40 rain gauge stations. While analyzing the long term average of monthly and annual rainfall, the annual rainfall of the region is 975.64 mm, of which the winter, summer, southwest and northeast monsoon records 24.16, 160.55, 401.19 and 389.73 mm respectively. The station Upper Niradam receives the highest rainfall of 4655.5 mm whereas Krishnapuram records the lowest of 414.4 mm. The annual variability ranges from 19.69 percent to 56.59 percent. The west, North West, North East and southern part of the region experience the heavy rainfall, whereas the east and central part of the region experiences the lowest rainfall