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Rain
fall Kerala receives a fairly good annual rainfall varying from 1250 to 5000 mm.The normal annual rainfall of Kerala is 3107 mm.(national average is 1197mm). The State has the benefit of the South West and North East 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 7030 crores quibic metres. The utilizable water resource is around 4200 crore qubic metres. The highest rainfall occurs in the high ranges of Idukki district where it exceeds 500 cm. This diversity of rainfall makes it very cold high up in the mountains, while lower down at an elevation of 1000 to 1500 meters, a bracing climate is experienced. In the plains and lowlands, it is generally warm and humid. Maximum temperature is around 36.7 degree C and the minimum is about 19.8 degree C...MORE
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