Weather in Tamil Nadu
Tamil Nadu is home to 61 cities tracked on Mausam Online, including சென்னை, கள்ளக்குறிச்சி, மதுரை. Live weather, hourly forecasts and air-quality data are available for every city.
Climate & seasons
Southern India enjoys a moderating coastal influence and benefits from two monsoons. The southwest monsoon brings rain in June–September; the northeast monsoon (October–December) sustains Tamil Nadu and Andhra coast.
When to visit Tamil Nadu
Pick cool dry months (November–February) for outdoor activities. May is peak heat; July–August is peak rain.
Air quality in Tamil Nadu
Track PM2.5 and PM10 per city above. Tamil Nadu cities follow the broader South Asian pattern — clean monsoon, polluted winter.