According to the IMD, scattered rainfall activity is expected to continue through July 22.
On July 20, isolated places across Tamil Nadu, Puducherry and Karaikal may receive light to moderate rain with thunderstorms and gusty winds.
On July 21, the Western Ghats districts are likely to witness moderate rainfall, while the rest of the state may receive isolated light showers with thunderstorm activity.
By July 22, moderate rain is expected to continue in the Western Ghats region, with light rainfall remaining possible in other parts of Tamil Nadu, Puducherry and Karaikal.
The weather department added that there is no significant change expected in maximum temperatures through July 22. Coastal Tamil Nadu, Puducherry and Karaikal are likely to record near-normal temperatures, while some interior districts could remain 2-3 degrees Celsius above normal.