IMD forecasts moderate rain in Tamil Nadu Western Ghats till July 31
Synopsis
A weak low-pressure system over the Tamil Nadu coast is channelling Bay of Bengal moisture into the Western Ghats, sustaining moderate rain through 31 July. Chennai faces a different challenge — not rain, but a punishing 39°C maximum with high humidity, making the city feel hotter even as the Ghats get wet.
Key Takeaways
The IMD has forecast moderate rainfall in Tamil Nadu's Western Ghats districts through 31 July .
A weak low-pressure circulation over the Tamil Nadu coast is driving the weather pattern, with no intensification expected.
Chennai is likely to see brief, localised showers on 26 July with a maximum temperature near 39°C and high humidity.
Maximum temperatures across Tamil Nadu and Puducherry are expected to stay close to normal until 29 July ; no heatwave forecast.
Residents in hilly and landslide-prone Western Ghats areas have been advised to monitor local weather updates closely.
The India Meteorological Department (IMD) has forecast moderate rainfall across the Western Ghats districts of Tamil Nadu through 31 July, attributing the weather pattern to a weak low-pressure circulation in the lower atmospheric levels over the Tamil Nadu coast. The system is expected to sustain moisture inflow from the Bay of Bengal, enhancing cloud formation over the Ghats and adjoining areas.
Weather Outlook for Western Ghats Districts
According to the IMD's latest bulletin, the weak atmospheric system will continue to influence weather across the state over the coming days. Moderate rainfall is likely to persist in districts along the Western Ghats until 31 July, offering some respite to these regions following a dry spell. Meteorologists noted, however, that the system is not expected to intensify into a stronger weather disturbance.
Outside the Ghats belt, conditions are forecast to remain relatively subdued. Light rain is expected at one or two places across other parts of Tamil Nadu, with only isolated showers possible depending on local developments.
Chennai Forecast: Warm and Humid Despite Showers
For Chennai, the IMD has predicted light rain at a few places during the day on 26 July. The showers are expected to be brief and localised, with no major weather disturbance anticipated for the state capital. Despite the possibility of intermittent rain, the city is likely to remain warm, with the maximum temperature expected to touch around 39 degrees Celsius. High humidity levels will contribute to sultry conditions even during dry intervals.
Temperature and Heatwave Outlook
Maximum temperatures across Tamil Nadu and Puducherry are expected to remain close to seasonal normals until 29 July. The IMD has not forecast any significant heatwave conditions or major deviations from typical temperatures during this period. This comes amid a broader pattern of uneven monsoon distribution across the state, with the Western Ghats bearing the bulk of rainfall activity.
Advisory for Residents
The IMD has advised residents — particularly those in hilly districts and areas along the Western Ghats — to monitor local weather updates and exercise caution during periods of moderate rainfall. Regions prone to waterlogging or minor landslides should remain on alert. Elsewhere in Tamil Nadu, conditions are expected to stay largely stable with only scattered light rain.
Point of View
Including Chennai, endures humid, near-dry conditions. A 39°C maximum in Chennai on a rainy day signals how humidity, not temperature alone, defines heat stress for millions of urban residents. The weak low-pressure system's limited reach also raises questions about whether the state's rain-shadow districts will see any meaningful relief this season. Forecasting a 'no intensification' scenario is reassuring, but the advisory for landslide-prone Ghats communities is a reminder that even moderate rainfall can carry serious risk in vulnerable terrain.
NationPress
26 Jul 2026
Frequently Asked Questions
Which districts in Tamil Nadu will receive moderate rainfall till July 31?
The IMD has forecast moderate rainfall specifically for districts along the Western Ghats in Tamil Nadu through 31 July. The rest of the state is expected to see only light, isolated showers during this period.
What is causing the rain in Tamil Nadu's Western Ghats?
A weak low-pressure circulation in the lower atmospheric levels over the Tamil Nadu coast is the primary driver. This system is supporting moisture inflow from the Bay of Bengal, leading to enhanced cloud formation over the Western Ghats. Meteorologists say it is not expected to intensify into a stronger disturbance.
What is the weather forecast for Chennai on July 26?
Chennai is expected to see light rain at a few places, with showers likely to be brief and localised. The maximum temperature is forecast to touch around 39 degrees Celsius, and high humidity will make conditions feel sultry even without continuous rainfall.
Will there be a heatwave in Tamil Nadu or Puducherry?
No. The IMD has not forecast any heatwave conditions for Tamil Nadu or Puducherry. Maximum temperatures are expected to remain close to seasonal normals until 29 July.
Should residents in Western Ghats areas take any precautions?
Yes. The IMD has advised residents in hilly districts and areas along the Western Ghats to track local weather updates and exercise caution during moderate rainfall, especially in regions prone to waterlogging or minor landslides.
