Question

Why r south west monsoons less rainy in tamil nadu ? explain why

Answer 1

In monsoon, the south west wind prevail which results in the rain in western ghats while in the end of monsoon, the north western winds prevail and it rains near tamil nadu 

Answer 2

The Eastern Ghats are lower in altitude than the Western ghats. Due to this the monsoon rains lose its moisture on the western slopes of the Western Ghats and the rest of the plateau and the eastern ghats gets scanty rainfall. As a result Tamil Nadu (Chennai) gets less rain fall during the South West Monsoons.