Rainfall

            The normal annual rainfall of Kerala is 3,107 mm (national average is 1,197mm). The State has the benefit of the Southwest and Northeast monsoon. Although, quantum wise the rainfall received is fairly high, its distribution shows wide temporal and spatial variations. On an average the number of rainy days is in the range of 120-140 in a year. The annual yield of water in Kerala in a normal year is around 7,030 crores cubic metres. The utilizable water resource is around 4,200 crore cubic metres.