Click on a day for an hourly weather forecast
The weather in Sylhet in September is very hot. The average temperatures are between 25°C and 32°C, drinking water regularly is advisable.
There’s going to be many days of rain during the month of September in Sylhet.
Sylhet should expect an average of 15 to 22 days of rain, so be sure to bring along a waterproof jacket to stay dry this month!
Our weather forecast can give you a great sense of what weather to expect in Sylhet in September 2025.
If you’re planning to visit Sylhet in the near future, we highly recommend that you review the 14 day weather forecast for Sylhet before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 27° / 14° | 1 | 31 | 0 | 6 mm | Perfect | Sylhet in January |
| February | 31° / 15° | 1 | 27 | 0 | 18 mm | Good | Sylhet in February |
| March | 35° / 19° | 4 | 27 | 0 | 108 mm | Ok | Sylhet in March |
| April | 35° / 23° | 14 | 16 | 0 | 356 mm | Bad | Sylhet in April |
| May | 34° / 25° | 20 | 11 | 0 | 672 mm | Bad | Sylhet in May |
| June | 33° / 26° | 25 | 5 | 0 | 766 mm | Ok | Sylhet in June |
| July | 32° / 25° | 26 | 5 | 0 | 677 mm | Ok | Sylhet in July |
| August | 32° / 25° | 25 | 6 | 0 | 700 mm | Ok | Sylhet in August |
| September | 32° / 25° | 21 | 9 | 0 | 628 mm | Ok | Sylhet in September |
| October | 32° / 22° | 11 | 20 | 0 | 306 mm | Ok | Sylhet in October |
| November | 30° / 18° | 2 | 28 | 0 | 38 mm | Good | Sylhet in November |
| December | 27° / 15° | 1 | 30 | 0 | 19 mm | Perfect | Sylhet in December |