Click on a day for an hourly weather forecast
The weather in Black River in September is hot. The average temperatures are between 20°C and 24°C.
You can expect a few rainy days in Black River during September, but usually the weather is comfortable in September.
Our weather forecast can give you a great sense of what weather to expect in Black River in September 2025.
If you’re planning to visit Black River in the near future, we highly recommend that you review the 14 day weather forecast for Black River before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 28° / 25° | 9 | 22 | 0 | 224 mm | Good | Black River in January |
| February | 29° / 25° | 10 | 18 | 0 | 243 mm | Ok | Black River in February |
| March | 29° / 24° | 8 | 23 | 0 | 170 mm | Ok | Black River in March |
| April | 27° / 24° | 5 | 25 | 0 | 118 mm | Perfect | Black River in April |
| May | 26° / 22° | 2 | 30 | 0 | 63 mm | Perfect | Black River in May |
| June | 25° / 21° | 1 | 29 | 0 | 45 mm | Perfect | Black River in June |
| July | 24° / 20° | 1 | 30 | 0 | 43 mm | Perfect | Black River in July |
| August | 24° / 20° | 1 | 30 | 0 | 49 mm | Perfect | Black River in August |
| September | 24° / 20° | 1 | 29 | 0 | 28 mm | Perfect | Black River in September |
| October | 26° / 22° | 1 | 30 | 0 | 41 mm | Perfect | Black River in October |
| November | 27° / 23° | 3 | 27 | 0 | 71 mm | Perfect | Black River in November |
| December | 28° / 24° | 4 | 27 | 0 | 100 mm | Perfect | Black River in December |