Click on a day for an hourly weather forecast
The weather in Koh Chang in September is hot. The average temperatures are between 22°C and 31°C.
There’s going to be many days of rain during the month of September in Koh Chang.
Koh Chang 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 Koh Chang in September 2025.
If you’re planning to visit Koh Chang in the near future, we highly recommend that you review the 14 day weather forecast for Koh Chang before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 30° / 16° | 1 | 30 | 0 | 26 mm | Good | Koh Chang in January |
| February | 34° / 18° | 0 | 28 | 0 | 11 mm | Ok | Koh Chang in February |
| March | 36° / 22° | 1 | 30 | 0 | 36 mm | Ok | Koh Chang in March |
| April | 37° / 24° | 6 | 24 | 0 | 101 mm | Ok | Koh Chang in April |
| May | 34° / 24° | 14 | 17 | 0 | 313 mm | Bad | Koh Chang in May |
| June | 31° / 23° | 20 | 10 | 0 | 459 mm | Ok | Koh Chang in June |
| July | 29° / 23° | 24 | 7 | 0 | 536 mm | Ok | Koh Chang in July |
| August | 30° / 23° | 24 | 7 | 0 | 585 mm | Ok | Koh Chang in August |
| September | 31° / 22° | 18 | 12 | 0 | 380 mm | Ok | Koh Chang in September |
| October | 31° / 21° | 8 | 23 | 0 | 159 mm | Ok | Koh Chang in October |
| November | 31° / 19° | 2 | 28 | 0 | 43 mm | Good | Koh Chang in November |
| December | 29° / 16° | 1 | 30 | 0 | 23 mm | Good | Koh Chang in December |