Click on a day for an hourly weather forecast
The temperatures in Cairns in September are comfortable with low of 19°C and and high up to 27°C.
You can expect a few rainy days in Cairns 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 Cairns in September 2025.
If you’re planning to visit Cairns in the near future, we highly recommend that you review the 14 day weather forecast for Cairns before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 30° / 24° | 11 | 21 | 0 | 337 mm | Ok | Cairns in January |
| February | 30° / 24° | 10 | 19 | 0 | 302 mm | Ok | Cairns in February |
| March | 29° / 23° | 8 | 23 | 0 | 239 mm | Ok | Cairns in March |
| April | 28° / 22° | 4 | 27 | 0 | 123 mm | Perfect | Cairns in April |
| May | 26° / 20° | 2 | 30 | 0 | 56 mm | Perfect | Cairns in May |
| June | 24° / 18° | 1 | 29 | 0 | 41 mm | Perfect | Cairns in June |
| July | 24° / 18° | 1 | 30 | 0 | 34 mm | Perfect | Cairns in July |
| August | 25° / 17° | 1 | 30 | 0 | 27 mm | Perfect | Cairns in August |
| September | 27° / 19° | 1 | 29 | 0 | 27 mm | Perfect | Cairns in September |
| October | 28° / 20° | 1 | 30 | 0 | 51 mm | Perfect | Cairns in October |
| November | 29° / 22° | 2 | 28 | 0 | 81 mm | Good | Cairns in November |
| December | 30° / 23° | 5 | 26 | 0 | 149 mm | Good | Cairns in December |