Why Chennai gets more Rainfall in Winter than in Summer”?
(i) Chennai lies on the eastern coast of the Peninsula. During summer, Arabian Sea branch of South-west Monsoon ascends the Western Ghats and causes maximum rainfall on its western side. On the other hand, the Tamil Nadu coast on which Chennai are located remains dry due to its location off the way of South-west Monsoon as moving towards east they go on shedding their moisture.
(ii) During winter, the North-east dry Monsoon winds blow over the Bay of Bengal. As they pass over the Bay of Bengal they pick up moisture and bring rain to the Tamil Nadu coast as now they are under the effect of on-shore winds, full of moisture. Chennai is situated on the east coast. That is why; Chennai receives rainfall more in winter than in summer.