Click on a day for an hourly weather forecast
The temperatures in Upper Swan in September are quite cold with temperatures between 9°C and 18°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Upper Swan 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 Upper Swan in September 2025.
If you’re planning to visit Upper Swan in the near future, we highly recommend that you review the 14 day weather forecast for Upper Swan before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 33° / 19° | 1 | 30 | 0 | 30 mm | Good | Upper Swan in January |
| February | 32° / 19° | 1 | 27 | 0 | 18 mm | Good | Upper Swan in February |
| March | 29° / 18° | 1 | 30 | 0 | 19 mm | Good | Upper Swan in March |
| April | 25° / 15° | 2 | 28 | 0 | 31 mm | Perfect | Upper Swan in April |
| May | 20° / 12° | 3 | 28 | 0 | 67 mm | Good | Upper Swan in May |
| June | 17° / 10° | 5 | 25 | 0 | 97 mm | Good | Upper Swan in June |
| July | 16° / 8° | 6 | 25 | 0 | 128 mm | Good | Upper Swan in July |
| August | 16° / 9° | 5 | 26 | 0 | 105 mm | Good | Upper Swan in August |
| September | 18° / 9° | 3 | 27 | 0 | 64 mm | Good | Upper Swan in September |
| October | 22° / 12° | 2 | 29 | 0 | 36 mm | Good | Upper Swan in October |
| November | 26° / 14° | 2 | 28 | 0 | 39 mm | Perfect | Upper Swan in November |
| December | 31° / 17° | 1 | 30 | 0 | 22 mm | Good | Upper Swan in December |