Banff weather in September
September in Banff: cool, a little rain, with clean air — not the best time to visit.
#10 of 12 months in Banff · #591 of 604 destinations to visit in September · comfort 38/100 (tier F)
Updated June 2026 · climate normals from ERA5 reanalysis
Banff climate normals — September
| Daytime high | 17°C / 62°F | 🙂 cool |
|---|---|---|
| Nighttime low | 6°C / 43°F | |
| Feels like (high) | 15°C / 59°F | |
| Rainfall | 46 mm / 1.8 in | 🌦 some rain |
| Rainy days | 9 days | |
| Humidity | 68% | 💧 humid |
| Dew point | 5°C / 42°F | |
| Sunshine | 10.3 h/day | |
| Daylight | 12.6 h | |
| Wind | 12 km/h / 8 mph | |
| Snowfall | 8.2 cm / 3.2 in | |
| Air quality (US AQI) | 36 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Banff in September — FAQ
- Is September a good time to visit Banff?
- September in Banff: cool, a little rain, with clean air — not the best time to visit. It ranks #10 of 12 months for Banff on SeasonMap's comfort score (38/100).
- What is the weather like in Banff in September?
- In September, Banff averages a daily high of 16.9°C and a low of 6.3°C, with about 45.6 mm of rain over roughly 9.4 rainy days.
- What is the air quality in Banff in September?
- Banff has a mean US Air Quality Index of about 36 in September.
- Does it snow in Banff in September?
- Banff sees roughly 8.2 cm of snowfall in September.