The Regional Meteorological Centre (RMC) has forecast moderate rainfall with gusty winds over isolated locations in the Western Ghats districts of Tamil Nadu on Tuesday and Wednesday, 8–9 July, while simultaneously warning that maximum temperatures across the state's plains — including Puducherry and Karaikal — could climb by up to 3 degrees Celsius during the same period. The dual advisory underscores a sharp divergence in weather conditions unfolding across Tamil Nadu this week.

Weather System Behind the Forecast

According to the RMC bulletin, a trough extending from south Gujarat to north Kerala is currently influencing weather patterns across peninsular India. This system is channelling moisture toward the Western Ghats, triggering intermittent showers at isolated locations along the hill districts. Gusty winds are expected to accompany some of the rain spells, weather officials noted.

The moderate rainfall window over the Western Ghats is not limited to the next two days — the RMC has extended its forecast, indicating that similar conditions will persist from Thursday through 12 July. Widespread or continuous rainfall, however, is not anticipated; the showers are expected to be localised and intermittent.

Plains Heat Warning for Tamil Nadu, Puducherry, and Karaikal

In sharp contrast to the hilly belt, the plains of Tamil Nadu, Puducherry, and Karaikal are bracing for a noticeable temperature spike. The RMC has forecast that maximum temperatures in these areas may rise by as much as 3 degrees Celsius on Tuesday and Wednesday. Residents have been advised to stay hydrated, limit outdoor activity during afternoon hours, and avoid prolonged exposure to direct sunlight.

This temperature increase comes during the southwest monsoon season, a period when the plains typically see fluctuating heat-humidity combinations that can make conditions feel significantly warmer than the recorded maximum.

Chennai Outlook: Partly Cloudy, Warm, and Humid

For Chennai, the forecast points to partly cloudy skies with the possibility of light rain in a few pockets of the city. No significant rainfall activity is expected. The city is likely to remain warm and humid, with temperatures staying above the seasonal normal. Residents should expect the characteristic sticky heat that accompanies low-intensity monsoon conditions in coastal areas.

Advisory and What to Watch

Weather officials have urged residents in the Western Ghats districts to stay alert to local updates, as rainfall intensity and wind speed can vary considerably from one location to another in hilly terrain. The RMC has stated it will continue monitoring the evolving weather system and will issue revised advisories if conditions change materially over the coming days. The contrasting weather pattern — rain relief in the hills, heat stress in the plains — is characteristic of the southwest monsoon's uneven distribution across Tamil Nadu's varied topography.