Chennai Weather Report: Chennai is expected to experience moderate rainfall today, September 17, 2025. The city’s maximum temperature will be between 33.4°C and the minimum temperature will be 27.9°C. Cloudy skies and light to moderate rain have been expected since morning, providing relief from the usual heat. The intensity of the rain may increase after noon. Wind speeds are expected to be around 22.3 kilometers per hour, which may provide some relief from the humid weather. The humidity level remains at 66%, which will make the heat a bit uncomfortable, but the rain will improve the situation somewhat.
The city’s Air Quality Index (AQI) is in the moderate category at 54. The rain is expected to reduce pollution levels. According to the previous day’s report, PM10 levels were 54 µg/m³, PM2.5 levels were 20 µg/m³, and carbon monoxide levels were 616 µg/m³. These levels do not pose an immediate health risk, but those living in traffic-heavy areas should exercise caution.
Residents are advised to carry rain gear, such as umbrellas and raincoats. Wet roads may cause traffic delays, so plan your time before going out. However, the morning will be favorable for light outdoor activities in less crowded areas. Moderate temperatures throughout the day are suitable for wearing light and airy clothing.
The sun will set at 6:09 pm, and light winds will prevail in the evening. The weather will remain variable in the coming days. Rain is also expected on September 18th, with temperatures ranging from 26.3°C to 33.7°C. Light rain is expected on September 19th and 20th, while the weather will begin to clear from September 21st. Warmer and less humid conditions will prevail in the latter half of the week, providing a favorable environment for outdoor activities. Pollution levels are also expected to drop.
This weather and air quality information is obtained from reliable sources such as AQI.in. Rain and moderate temperatures will keep pollution levels low in the city, which may have positive health effects. Chennai residents should plan their day carefully to accommodate the changing weather.