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The temperatures in Sidney in September are quite cold with temperatures between 9°C and 20°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Sidney 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 Sidney in September 2025.
If you’re planning to visit Sidney in the near future, we highly recommend that you review the 14 day weather forecast for Sidney before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -11° / -19° | 2 | 11 | 18 | 23 mm | Awful | Sidney in January |
| February | -11° / -19° | 2 | 11 | 15 | 20 mm | Awful | Sidney in February |
| March | -2° / -9° | 5 | 11 | 16 | 36 mm | Awful | Sidney in March |
| April | 7° / -1° | 4 | 17 | 9 | 53 mm | Bad | Sidney in April |
| May | 16° / 7° | 6 | 24 | 1 | 102 mm | Good | Sidney in May |
| June | 22° / 12° | 7 | 23 | 0 | 145 mm | Ok | Sidney in June |
| July | 26° / 14° | 5 | 26 | 0 | 81 mm | Perfect | Sidney in July |
| August | 26° / 13° | 5 | 26 | 0 | 78 mm | Perfect | Sidney in August |
| September | 20° / 9° | 4 | 26 | 0 | 69 mm | Good | Sidney in September |
| October | 10° / 3° | 4 | 22 | 5 | 59 mm | Bad | Sidney in October |
| November | -1° / -7° | 3 | 14 | 13 | 33 mm | Awful | Sidney in November |
| December | -9° / -15° | 2 | 12 | 17 | 30 mm | Awful | Sidney in December |