<P> The cold weather commences early in February and comes to an end in the middle of March . The climate in the cold weather is pleasant . The days are bright and sunny the sun is not too hot . </P> <P> As soon as the sun sets the temperature falls and the heat of the day yields place to cooler weather . </P> <P> The state has three distinct periods of rainfall: advance rainfall; rainfall from the tropical cyclones emerging in the neighbourhood of the Andaman islands during the Retreat of Monsoons (October--November); and the North East monsoon during the months of October--December, with dominant northeast monsoon winds from the western disturbances emerging over the Mediterranean Sea . The dry season is from February to early June . </P> <P> Tamil Nadu has rain during the monsoon season due to the southwest trade winds which blow towards the northern hemisphere . Tamil Nadu receives rainfall in the winter season due to northeast trade winds . The normal annual rainfall of the state is about 945 mm (37.2 in) of which 48% is through the North East monsoon, and 32% through the South West monsoon . Since the state is entirely dependent on rains for recharging its water resources, monsoon failures lead to acute water scarcity and severe drought . </P>

When does the coast of tamilnadu receive rainfall
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