September · Canada
Best time to visit Banff in September Weather, crowds & prices
Weather in Banff in September
Average temperature 8°C, 45 mm of rain, about 12 days with 6+ hours of sunshine and 74% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
7.5/10
Ranked #4 of 12 months
- Avg temp
- 8°C
- Rainfall
- 45 mm
- Humidity
- 74%
- Days with 6h+ sun
- 12
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
September in Banff scores 7.5/10 for nature and wildlife travel - an above-average month (#4 of 12). Expect around 8°C, 45 mm of rain, and roughly 12 days with 6+ hours of sunshine this month.
Alpine lakes and trail season peak in the bright June-August window.
September in Banff: strong conditions, 4th of 12
Expect 8°C (46°F) in September. A good month for city streets, viewpoints and long meals; leave swimming for another season.
Budget for roughly 45 mm of rain this month — a flexible day or two helps — with about 12 days with 6+ hours of sunshine and 12.4 hours of daylight to work around it.
That is 7.5/10 on the same scale — 4th of 12 months, versus 9.5/10 for the best month here.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a packable rain layer, footwear you can get muddy.
Expect mid-season pricing, and crowds are moderate.
If your dates are flexible, July is materially better in Banff — 2 points higher on the same scale.
Frequently asked
- What is the weather like in Banff in September?
- In September, Banff averages 8°C, 45 mm of rain, and about 12 days with 6+ hours of sunshine. Its climate-comfort score is 7.5/10.
- Is September a good time to visit Banff?
- September earns a 7.5/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Banff in September?
- Expect about 45 mm of rain in September. Average humidity is 74% and there are about 12 days with 6+ hours of sunshine.
Curated in Banff
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Banff, Canada. Live activities and tours from GetYourGuide, matched to this destination.