Click on a day for an hourly weather forecast
The temperatures in Sydney in September are usually low and can range between 12°C and 19°C.
You can expect about 3 to 8 days of rain in Sydney 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 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 | -1° / -6° | 9 | 4 | 20 | 135 mm | Awful | Sydney in January |
| February | -2° / -7° | 8 | 3 | 18 | 139 mm | Awful | Sydney in February |
| March | 1° / -5° | 11 | 6 | 15 | 113 mm | Awful | Sydney in March |
| April | 5° / 0° | 12 | 11 | 7 | 136 mm | Awful | Sydney in April |
| May | 11° / 4° | 8 | 23 | 1 | 103 mm | Bad | Sydney in May |
| June | 16° / 9° | 8 | 22 | 0 | 137 mm | Ok | Sydney in June |
| July | 21° / 14° | 5 | 26 | 0 | 94 mm | Good | Sydney in July |
| August | 23° / 15° | 5 | 26 | 0 | 107 mm | Perfect | Sydney in August |
| September | 19° / 12° | 5 | 25 | 0 | 103 mm | Good | Sydney in September |
| October | 13° / 7° | 7 | 23 | 1 | 137 mm | Bad | Sydney in October |
| November | 7° / 3° | 11 | 12 | 7 | 131 mm | Awful | Sydney in November |
| December | 2° / -2° | 10 | 6 | 16 | 146 mm | Awful | Sydney in December |