oh you will come to know once you get there , its a whole year , just go there and enjoy the dosas and idlis , tamil slang like you would have never heard before , heat and humidity , great place
@OP: Chennai has a very humid climate. And hot. Actually Chennai is notorious for its three season climate - hot, hotter, hottest So most of the year the temperatures are in the 32 - 37 range with summers going up a bit. This year has been better than recent ones relatively. Don't bother about warm clothes, or for any rainy season material. Doesn't rain a lot, just leaves a lot of slush when it does