Click on a day for an hourly weather forecast
The temperatures in Sydney in September are comfortable with low of 12°C and and high up to 22°C.
The wather in Sydney in September can vary between cold and nice weather days. Expect a few rainy days but usually not more than 3.
Our weather forecast can give you a great sense of what weather to expect in Sydney in September 2025.
If you’re planning to visit Sydney in the near future, we highly recommend that you review the 14 day weather forecast for Sydney before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 29° / 19° | 4 | 27 | 0 | 105 mm | Good | Sydney in January |
| February | 28° / 19° | 5 | 23 | 0 | 129 mm | Perfect | Sydney in February |
| March | 26° / 18° | 4 | 27 | 0 | 133 mm | Perfect | Sydney in March |
| April | 23° / 15° | 3 | 27 | 0 | 83 mm | Perfect | Sydney in April |
| May | 20° / 12° | 3 | 29 | 0 | 50 mm | Good | Sydney in May |
| June | 17° / 10° | 4 | 26 | 0 | 97 mm | Good | Sydney in June |
| July | 17° / 9° | 2 | 29 | 0 | 40 mm | Good | Sydney in July |
| August | 19° / 9° | 2 | 29 | 0 | 58 mm | Good | Sydney in August |
| September | 22° / 12° | 2 | 28 | 0 | 55 mm | Good | Sydney in September |
| October | 24° / 13° | 4 | 27 | 0 | 92 mm | Perfect | Sydney in October |
| November | 26° / 16° | 5 | 25 | 0 | 105 mm | Perfect | Sydney in November |
| December | 28° / 17° | 5 | 26 | 0 | 81 mm | Perfect | Sydney in December |