Click on a day for an hourly weather forecast
The temperatures in Koh Rong during September are extremely high, between 27°C and hot as 29°C, drinking water regularly is advisable.
There’s going to be many days of rain during the month of September in Koh Rong.
Koh Rong 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 Rong in September 2025.
If you’re planning to visit Koh Rong in the near future, we highly recommend that you review the 14 day weather forecast for Koh Rong before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 29° / 25° | 4 | 27 | 0 | 97 mm | Good | Koh Rong in January |
| February | 29° / 26° | 2 | 26 | 0 | 72 mm | Good | Koh Rong in February |
| March | 29° / 27° | 6 | 25 | 0 | 139 mm | Good | Koh Rong in March |
| April | 30° / 28° | 12 | 18 | 0 | 251 mm | Ok | Koh Rong in April |
| May | 30° / 28° | 17 | 14 | 0 | 417 mm | Ok | Koh Rong in May |
| June | 30° / 28° | 20 | 10 | 0 | 720 mm | Ok | Koh Rong in June |
| July | 29° / 27° | 21 | 10 | 0 | 812 mm | Ok | Koh Rong in July |
| August | 29° / 27° | 21 | 10 | 0 | 821 mm | Ok | Koh Rong in August |
| September | 29° / 27° | 19 | 11 | 0 | 707 mm | Ok | Koh Rong in September |
| October | 29° / 27° | 16 | 15 | 0 | 483 mm | Ok | Koh Rong in October |
| November | 29° / 26° | 11 | 19 | 0 | 286 mm | Ok | Koh Rong in November |
| December | 29° / 25° | 5 | 26 | 0 | 127 mm | Good | Koh Rong in December |