Click on a day for an hourly weather forecast
The temperatures in Muswellbrook in September are quite cold with temperatures between 8°C and 20°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Muswellbrook 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 Muswellbrook in September 2025.
If you’re planning to visit Muswellbrook in the near future, we highly recommend that you review the 14 day weather forecast for Muswellbrook before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 30° / 17° | 4 | 27 | 0 | 87 mm | Good | Muswellbrook in January |
| February | 28° / 16° | 4 | 24 | 0 | 96 mm | Perfect | Muswellbrook in February |
| March | 25° / 15° | 5 | 26 | 0 | 113 mm | Perfect | Muswellbrook in March |
| April | 22° / 12° | 3 | 27 | 0 | 60 mm | Good | Muswellbrook in April |
| May | 18° / 8° | 2 | 29 | 0 | 36 mm | Good | Muswellbrook in May |
| June | 14° / 6° | 5 | 25 | 0 | 75 mm | Good | Muswellbrook in June |
| July | 14° / 5° | 3 | 28 | 0 | 50 mm | Good | Muswellbrook in July |
| August | 16° / 5° | 3 | 28 | 0 | 55 mm | Good | Muswellbrook in August |
| September | 20° / 8° | 3 | 27 | 0 | 56 mm | Good | Muswellbrook in September |
| October | 23° / 10° | 5 | 26 | 0 | 70 mm | Perfect | Muswellbrook in October |
| November | 26° / 14° | 5 | 25 | 0 | 105 mm | Perfect | Muswellbrook in November |
| December | 28° / 16° | 6 | 25 | 0 | 101 mm | Perfect | Muswellbrook in December |