Chennai weather in September
In September, Chennai has an average high of 32 °C89 °F and an average low of 25 °C77 °F, with about 145 mm5.7 in of precipitation. It is the 7th warmest month of the year and ranks 3rd for precipitation.
How September compares with other months
Compared with August, September is 0.7 °C1.3 °F cooler on average and wetter by 12 mm0.5 in. Compared with October, September is 0.9 °C1.6 °F warmer on average and drier by 119 mm4.7 in. Daylight lasts about 12.2 hours around the middle of the month. Average relative humidity is 77% and the average cloud amount 72%.
Is September a good time to visit Chennai?
September is not among the most comfortable months by our comfort score: it is hot (average high 32 °C89 °F), it is fairly wet (145 mm5.7 in) and it is humid (77%). The most comfortable months in Chennai are January.
What to wear in September
For Chennai in September, pack very light, breathable clothing, a sun hat and plenty of water and an umbrella or light rain jacket.
September in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Chennai | 3289 | 2577 | 1455.7 |
| Pallavaram | 3289 | 2577 | 1455.7 |
| Kanchipuram | 3188 | 2577 | 1455.7 |
| Tirupati | 3290 | 2374 | 1325.2 |
| Vellore | 3289 | 2373 | 1445.7 |
| Chittoor | 3188 | 2272 | 1445.7 |
| Puducherry | 3188 | 2680 | 1234.8 |
| Nellore | 3290 | 2679 | 1104.3 |
| Tiruvannamalai | 3290 | 2374 | 1285.0 |
Nearby places that are more than 1 °C1.8 °F cooler: Vellore and Chittoor.
Other months in Chennai
- January28 °C82 °F / 21 °C69 °F
- February30 °C87 °F / 21 °C70 °F
- March34 °C93 °F / 23 °C74 °F
- April36 °C96 °F / 26 °C79 °F
- May36 °C97 °F / 27 °C81 °F
- June35 °C95 °F / 27 °C80 °F
- July34 °C93 °F / 26 °C79 °F
- August33 °C91 °F / 25 °C78 °F
- September32 °C89 °F / 25 °C77 °F
- October30 °C87 °F / 25 °C77 °F
- November29 °C83 °F / 23 °C74 °F
- December27 °C81 °F / 22 °C71 °F
Frequently asked questions
How warm is Chennai in September?
In September the average high in Chennai is 32 °C (89 °F) and the average low is 25 °C (77 °F).
Does it rain a lot in Chennai in September?
On average about 145 mm (5.7 in) of precipitation falls in September; it ranks 3rd of the 12 months.
Is September the warmest month in Chennai?
No. The warmest month in Chennai is May, with an average high of 36 °C (97 °F). The coldest month is January, with an average low of 21 °C (69 °F).
How long is the day in Chennai in September?
In the middle of September the day in Chennai lasts about 12.2 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Chennai in September?
The average relative humidity in September is about 77%. Combined with warm days, it can feel muggy.
How cloudy is Chennai in September?
On average about 72% of the sky is covered by cloud in September. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.