Click on a day for an hourly weather forecast
The temperatures in Blacktown in September are comfortable with low of 11°C and and high up to 22°C.
The wather in Blacktown 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 Blacktown in September 2025.
If you’re planning to visit Blacktown in the near future, we highly recommend that you review the 14 day weather forecast for Blacktown before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 30° / 19° | 4 | 27 | 0 | 89 mm | Good | Blacktown in January |
| February | 28° / 18° | 5 | 24 | 0 | 125 mm | Perfect | Blacktown in February |
| March | 26° / 17° | 4 | 27 | 0 | 118 mm | Perfect | Blacktown in March |
| April | 23° / 15° | 3 | 27 | 0 | 69 mm | Perfect | Blacktown in April |
| May | 20° / 11° | 2 | 29 | 0 | 43 mm | Good | Blacktown in May |
| June | 17° / 9° | 3 | 27 | 0 | 77 mm | Good | Blacktown in June |
| July | 17° / 8° | 2 | 29 | 0 | 37 mm | Good | Blacktown in July |
| August | 19° / 9° | 2 | 29 | 0 | 50 mm | Good | Blacktown in August |
| September | 22° / 11° | 2 | 28 | 0 | 50 mm | Good | Blacktown in September |
| October | 24° / 13° | 4 | 27 | 0 | 83 mm | Perfect | Blacktown in October |
| November | 26° / 15° | 5 | 25 | 0 | 95 mm | Perfect | Blacktown in November |
| December | 28° / 17° | 4 | 27 | 0 | 72 mm | Perfect | Blacktown in December |