Click on a day for an hourly weather forecast
The weather in Hamilton Island in September is hot. The average temperatures are between 22°C and 23°C.
You can expect a few rainy days in Hamilton Island during September, but usually the weather is comfortable in September.
Our weather forecast can give you a great sense of what weather to expect in Hamilton Island in September 2025.
If you’re planning to visit Hamilton Island in the near future, we highly recommend that you review the 14 day weather forecast for Hamilton Island before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 28° / 26° | 8 | 23 | 0 | 413 mm | Good | Hamilton Island in January |
| February | 28° / 27° | 9 | 20 | 0 | 371 mm | Good | Hamilton Island in February |
| March | 28° / 26° | 11 | 20 | 0 | 480 mm | Good | Hamilton Island in March |
| April | 26° / 25° | 6 | 24 | 0 | 213 mm | Perfect | Hamilton Island in April |
| May | 24° / 22° | 3 | 28 | 0 | 116 mm | Perfect | Hamilton Island in May |
| June | 22° / 20° | 2 | 28 | 0 | 72 mm | Good | Hamilton Island in June |
| July | 21° / 19° | 2 | 29 | 0 | 67 mm | Good | Hamilton Island in July |
| August | 22° / 20° | 1 | 30 | 0 | 39 mm | Good | Hamilton Island in August |
| September | 23° / 22° | 1 | 29 | 0 | 25 mm | Perfect | Hamilton Island in September |
| October | 25° / 23° | 1 | 30 | 0 | 58 mm | Perfect | Hamilton Island in October |
| November | 26° / 25° | 3 | 27 | 0 | 112 mm | Perfect | Hamilton Island in November |
| December | 27° / 26° | 5 | 26 | 0 | 237 mm | Perfect | Hamilton Island in December |