Chennai weather: Tamil Nadu is likely to receive light rainfall with thunderstorms or lightning on Wednesday, March 18. According to the India Meteorological Department (IMD), Coimbatore, Dindigul, Theni and Thoothukudi may see light to moderate rain today. No rain forecast has been made for Chennai for March 19. It is normal for Tamil Nadu to experience thunderstorm activity during March, and weather systems over Kerala may also influence wet spell in parts of the State.