Average temperatures, rainfall and packing tips for Chennai, India in September
September in Chennai is typically very hot, with average daytime highs around 34°C and nights near 26°C. Temperature-wise it sits mid-range for Chennai (the 5th warmest month).
September is one of the wetter months in Chennai, with around 123 mm of rain - plan around showers.
If your dates are flexible, the most comfortable months in Chennai are usually January, November and December.
← Chennai weather tomorrow (live)
In September, Chennai averages a daytime high of about 34°C and a night-time low of around 26°C, based on recent historical data.
September is one of the wetter months in Chennai, with around 123 mm of rain - plan around showers.
September is seriously hot in Chennai. It's still doable - plan outdoor activities for early morning or evening, and build in shade and hydration breaks around midday. If your dates are flexible, the most comfortable months in Chennai are usually January, November and December.