Normally average temperatures in Banff throughout September is 9 with a general average high of 18 with low of 3 degrees. With the details being further below:
| Month | Degrees Celsius |
|---|---|
| Temperature | 9 |
| High Temperature | 18 |
| Low Temperature | 3 |
| Sunshine Per Day | 6 |
Useful Links: Banff Weather: Average Weather & Yearly Climate