Click on a day for an hourly weather forecast
The temperatures in Indonesia during September are extremely high, between 27°C and hot as 31°C, drinking water regularly is advisable.
You can expect about 3 to 8 days of rain in Indonesia during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Indonesia in September 2025.
If you’re planning to visit Indonesia in the near future, we highly recommend that you review the 14 day weather forecast for Indonesia before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 30° / 27° | 11 | 20 | 0 | 257 mm | Ok | Indonesia in January |
| February | 30° / 26° | 13 | 16 | 0 | 316 mm | Ok | Indonesia in February |
| March | 31° / 27° | 13 | 18 | 0 | 261 mm | Ok | Indonesia in March |
| April | 31° / 27° | 13 | 17 | 0 | 259 mm | Ok | Indonesia in April |
| May | 32° / 27° | 10 | 21 | 0 | 193 mm | Ok | Indonesia in May |
| June | 31° / 27° | 8 | 22 | 0 | 181 mm | Ok | Indonesia in June |
| July | 31° / 26° | 6 | 25 | 0 | 133 mm | Good | Indonesia in July |
| August | 31° / 26° | 5 | 26 | 0 | 110 mm | Good | Indonesia in August |
| September | 31° / 27° | 6 | 24 | 0 | 124 mm | Good | Indonesia in September |
| October | 32° / 27° | 11 | 20 | 0 | 197 mm | Ok | Indonesia in October |
| November | 31° / 27° | 11 | 19 | 0 | 230 mm | Ok | Indonesia in November |
| December | 31° / 27° | 11 | 20 | 0 | 219 mm | Ok | Indonesia in December |