Chennai in October
October marks the arrival of the northeast monsoon, Chennai's primary rainy season. The first significant rains cool the city dramatically, and Deepavali (usually October or November) brings the biggest pan-Indian celebration. Rain can be intense but intermittent, and the city is at its greenest and freshest.
October Weather
Temperature
25-32°C
Humidity
75-85%
Rainfall
Northeast monsoon begins. Heavy spells possible.
Rain arrives. Temperatures drop noticeably. The city feels fresh and green between rain spells.
Festivals & Events
Deepavali
October/November (varies)The biggest pan-Indian festival. New clothes, sweets, oil baths at dawn, firecrackers. Shopping peaks in T. Nagar weeks before.
Things to Do
- Deepavali shopping in T. Nagar and Pondy Bazaar (arrive early to beat crowds)
- Experience Deepavali morning in a Chennai neighbourhood
- Visit temples decorated for Deepavali
- Enjoy rain-washed walks in Besant Nagar or Adyar after a spell
- Visit Semmozhi Poonga (lush and green after rain)
- Try monsoon-season snacks: bajji, bonda, filter coffee
Practical Tips
- What to wear: Light cotton but carry rain gear. Waterproof footwear recommended. The temperature drop feels refreshing.
- Travel tip: Check weather forecasts daily. Intense rain spells can disrupt travel for a day or two. Deepavali week is the busiest shopping period in the year.
Related Pages
Frequently Asked Questions
Does it rain heavily in Chennai in October?
The northeast monsoon typically begins in October. Heavy rain spells are possible, especially late in the month. Rains are intermittent rather than continuous.
When is Deepavali in Chennai?
Deepavali falls in October or November depending on the Hindu calendar. Shopping season starts 2-3 weeks before. T. Nagar is the epicentre of Deepavali shopping.