Tamil Nadu has a tropical climate with no wild swing between summer and winter temperatures. April and May are the hottest months with the mercury often soaring above the 40 degree Celsius mark. Coastal regions also get uncomfortably warm and humid during these months but the nights are usually cool, thanks to the sea breeze that sets in during the afternoon.

A mild winter falls between November and February when the climate is pleasantly cool unless you wish to visit the hill stations, in which case you will need woollens.