Districts along the Western Ghats in Tamil Nadu are likely to receive moderate rain over the next three days, even as maximum temperatures could climb by up to three degrees Celsius in parts of the state, Puducherry, and Karaikal, the Regional Meteorological Centre (RMC), Chennai said on 28 October 2026. The dual outlook — localised showers in the hills alongside rising daytime heat in the plains — underlines a split in weather conditions across the region.

Rainfall Forecast: Western Ghats vs Southern Districts

The RMC's weather bulletin forecast moderate rain in the Western Ghats districts for Wednesday, 28 October. One or two locations in southern Tamil Nadu may also receive light rain, though the bulletin described coverage there as isolated. The contrast signals a clear variation in rainfall intensity: heavier showers confined to the hill districts, with only scattered activity further south.

For Thursday, 29 October, the centre predicted a step-down in intensity, with light rain expected at one or two places in both the Western Ghats districts and southern Tamil Nadu — suggesting a gradual easing of precipitation in the hill belt compared with the moderate showers forecast for today.

Outlook Through October 31

The bulletin extended the forecast window to 31 October, indicating the possibility of light rain at one or two places across Tamil Nadu, Puducherry, and Karaikal. Although the geographic coverage of the 31 October forecast is broader — spanning both the state and the adjoining Union Territory regions — precipitation is expected to remain confined to isolated locations. Widespread or sustained rainfall is not anticipated.

Temperature Rise Alongside Showers

In a notable accompaniment to the rain outlook, the RMC said maximum temperatures could increase by up to 3°C in some places across Tamil Nadu, Puducherry, and Karaikal through 31 October. The centre specified that the projected rise applies to select locations and does not indicate a uniform warming across all districts. The combination of isolated showers and rising daytime heat is characteristic of the post-monsoon transition period in peninsular India, when retreating systems can leave pockets of residual moisture even as temperatures rebound.

Chennai Forecast: Warm and Partly Cloudy

For Chennai, the RMC forecast partly cloudy skies on 28 October, with the maximum temperature likely to touch around 36 degrees Celsius. No significant rainfall is expected in the city. The forecast points to a warm day with partial cloud cover — broadly consistent with late-October conditions in the coastal capital, where the northeast monsoon typically picks up pace through November.

Overall, the weather picture across Tamil Nadu through the end of October combines moderate hill-district rainfall today, lighter and more scattered showers from Thursday onwards, and a gradual warming trend in the plains that residents and farmers in the region should factor into their plans.