Click on a day for an hourly weather forecast
The temperatures in Blue Mountain in September are comfortable with low of 19°C and and high up to 24°C.
You can expect a few rainy days in Blue Mountain 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 Blue Mountain in September 2025.
If you’re planning to visit Blue Mountain in the near future, we highly recommend that you review the 14 day weather forecast for Blue Mountain before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 28° / 25° | 11 | 20 | 0 | 308 mm | Good | Blue Mountain in January |
| February | 28° / 25° | 10 | 18 | 0 | 247 mm | Good | Blue Mountain in February |
| March | 28° / 24° | 10 | 21 | 0 | 317 mm | Good | Blue Mountain in March |
| April | 26° / 22° | 5 | 25 | 0 | 128 mm | Perfect | Blue Mountain in April |
| May | 24° / 20° | 4 | 27 | 0 | 75 mm | Perfect | Blue Mountain in May |
| June | 22° / 17° | 3 | 27 | 0 | 36 mm | Good | Blue Mountain in June |
| July | 21° / 16° | 2 | 29 | 0 | 59 mm | Good | Blue Mountain in July |
| August | 22° / 17° | 1 | 30 | 0 | 25 mm | Good | Blue Mountain in August |
| September | 24° / 19° | 1 | 29 | 0 | 19 mm | Perfect | Blue Mountain in September |
| October | 26° / 21° | 3 | 28 | 0 | 45 mm | Perfect | Blue Mountain in October |
| November | 27° / 23° | 6 | 24 | 0 | 89 mm | Perfect | Blue Mountain in November |
| December | 28° / 24° | 8 | 23 | 0 | 179 mm | Good | Blue Mountain in December |