Click on a day for an hourly weather forecast
The temperatures in Chennai during September are extremely high, between 27°C and hot as 33°C, drinking water regularly is advisable.
You can expect rain for roughly half of the month of September in Chennai. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Chennai in September 2025.
If you’re planning to visit Chennai in the near future, we highly recommend that you review the 14 day weather forecast for Chennai before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 29° / 23° | 1 | 30 | 0 | 32 mm | Good | Chennai in January |
| February | 30° / 24° | 1 | 28 | 0 | 15 mm | Good | Chennai in February |
| March | 33° / 26° | 1 | 30 | 0 | 25 mm | Good | Chennai in March |
| April | 35° / 28° | 2 | 28 | 0 | 21 mm | Ok | Chennai in April |
| May | 37° / 30° | 2 | 29 | 0 | 60 mm | Ok | Chennai in May |
| June | 36° / 29° | 6 | 24 | 0 | 118 mm | Ok | Chennai in June |
| July | 34° / 28° | 5 | 26 | 0 | 140 mm | Ok | Chennai in July |
| August | 34° / 28° | 8 | 23 | 0 | 225 mm | Bad | Chennai in August |
| September | 33° / 27° | 11 | 19 | 0 | 250 mm | Ok | Chennai in September |
| October | 32° / 27° | 11 | 20 | 0 | 292 mm | Ok | Chennai in October |
| November | 29° / 25° | 10 | 20 | 0 | 401 mm | Ok | Chennai in November |
| December | 28° / 24° | 5 | 26 | 0 | 193 mm | Perfect | Chennai in December |