Q:- Which wind cause rainfall in Tamil Nadu ?
-> The North East monsoon...
South-West monsoon winds blow over the entire Indian sub continent from June to September. The whole of India except the east coast including Tamil Nadu recieves rainfall due to this monsoon wind.
The Southern hemisphere experiences summer season from October to March. Because of high temperature, a low-pressure belt is developed over the Southern hemisphere. India experiences winter season during these months. A highpressure belt is developed over Northwest India due to low temperature. From the high-pressure centre of India, wind starts blowing towards the low-pressure centre in the Southern hemisphere. Due to rotation of the Earth, this wind is deflected as North-East winds. So it is known as North-East Monsoon wind. Entire Tamil Nadu and Eastern Coast of India receive rainfall due to the North - East monsoon wind.
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