Chennai weather in October
Temperature, sea and sunshine in October: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in October
Poor
Best time to visit: January – February
What is the weather like in Chennai in October?
In October, Chennai is hot: daytime highs average 31 °C, and even at night it stays warm at around 25 °C. The sea averages 29.4 °C – almost as warm as a bath. Expect around 5 hours of sunshine a day. It is the rainy season: rain falls on about 19 days, totalling 204 mm. On about 21 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, October is not an ideal month for a holiday in Chennai.
October compared
How the weather changes from September to November. Tap a month to open it.
| SeptemberSep | OctoberOct | NovemberNov | |
|---|---|---|---|
| Score | 26 | 34 | 49 |
| Day | 33° | 31° | 29° |
| Night | 26° | 25° | 24° |
| Sea | 29° | 29° | 28° |
| Sun | 5 h | 5 h | 5 h |
| Rain days | 17 | 19 | 17 |
More details for October
- Daylight
- 11 h 52 min05:59 – 17:50
- UV index
- 11 · extremeclear sky, noon (estimate)All months
- Muggy days
- 31 daysdew point 18 °C or moreAll months
- Wind
- 15 km/haverage daily peakAll months
- Cloud cover
- 70 %on averageAll months
- Hot days
- 21 days30 °C or moreAll months
- Time zone
- UTC+5:30Asia/Kolkata
How the score comes together
- Temperatureweight 50 %54 %
- Sunshineweight 20 %33 %
- Few rainy daysweight 30 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
- Rain jacket or umbrella
Chennai in October: quick answers
Is Chennai hot in October?
Yes. In October, Chennai is hot: daytime highs average 31 °C and nights stay around 25 °C. On about 21 days the thermometer climbs to 30 °C or more.
Can you swim in Chennai in October?
Yes. In October the sea averages 29.4 °C – almost as warm as a bath.
Does it rain much in Chennai in October?
It rains often – on about 19 days, adding up to 204 mm.
Chennai month by month
The whole year in ChennaiAll destinations: IndiaWhere to go in OctoberSea temperature in October
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences