South India is the area encompassing the Indian states of Andhra Pradesh, Karnataka, Kerala, Tamil Nadu, and Telangana as well as the union territories of Andaman and Nicobar, Lakshadweep and Puducherry, occupying 19.31% of India’s area.
Tiruchirappalli (Google Map)
Coimbatore (Google Map)
The best time to visit tropical South India is during the winter months, but even then there are some distinct regional variations. The peak season is from December to February when the climate is at its most pleasant.