Early autumn · Weather & things to do
Banff in September
Banff cools off: highs slip to 59°F (15°C), from 68°F in August, with lows of 39°F (4°C) and about 2.7 in (69 mm) of rain.
It scores 76/100 for comfort, 3rd of 12, which makes it a solid shoulder-season month.
- Avg high
- 59°F (15°C)
- Avg low
- 39°F (4°C)
- Rain
- 2.7 in (69 mm)
- Humidity
- 77%
- Cloud cover
- 62%
- Daylight
- ~12 h 22 min
- Comfort score
- 76/100 · Great
What September feels like
Expect mild afternoons around 59°F (15°C), good for long walks.
After dark, temperatures fall to about 39°F (4°C).
Some rain is likely, about 2.7 in (69 mm) in the month, so pack for a shower or two.
Plan around September
September is shoulder season: good weather, a step below the best months (July & August).
- Comfort slips from 89/100 in August to 76/100.
- September sits inside the Jun – Sep window our Banff & Jasper Loop recommends.
What to pack for September
- A warm layer for eveningslows near 39°F
- Packable rain jacket or umbrellaabout 2.7 in of rain
- Comfortable walking shoesmost picks involve some walking
What to do in Banff in September
September is good outdoor weather here, so these picks lean toward the open air.
Lake Minnewanka
Largest lake in the park, with a lakeshore trail and boat cruises.
Why now Our curated notes say it's best Jun–Sep.
Bow Falls
Wide falls on the Bow River below the Fairmont Banff Springs, an easy walk from town.
Why now September scores 76/100 for comfort, good conditions for being outside.
Banff Gondola
Gondola up Sulphur Mountain to a summit boardwalk with views over six ranges.
Why now Highs near 59°F and 2.7 in of monthly rain make this an easy outdoor pick.
Whyte Museum of the Canadian Rockies
Local art and mountain history museum on Bear Street.
Wild Flour Bakery
Banff bakery-café for breakfast sandwiches, pastries and coffee.
Nearby in September
- Lake Louise in September~31 mi · highs 55°F, 3.1 in rain · 2°C (4°F) cooler by day, about as wet
- Jasper in September~158 mi · highs 60°F, 2.3 in rain · similar daytime temperatures, about as wet
- Glacier National Park in September~185 mi · highs 59°F, 2.2 in rain · similar daytime temperatures, about as wet
NASA POWER 2001–2025 monthly averages on a ~50 km grid, temperatures adjusted from the grid cell's ~1,960 m to Banff's ~1,388 m elevation (standard lapse rate). Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Banff in September: quick answers
Is September a good time to visit Banff?
It's a good shoulder-season choice, scoring 76/100 against a best of 89 in July & August. Expect highs of 59°F (15°C) and 2.7 in (69 mm) of rain. September is inside the Jun – Sep window our Banff & Jasper Loop recommends.
How cold is Banff in September?
Average highs are 59°F (15°C) and average lows 39°F (4°C), making it the 4th-warmest month by daytime highs.
Does it rain a lot in Banff in September?
Some: about 2.7 in (69 mm) of rain falls across September on average, the 4th-wettest month of the year. The annual total is about 30.9 in (785 mm).
What should I pack for Banff in September?
Bring a warm layer for evenings (lows near 39°F), packable rain jacket or umbrella (about 2.7 in of rain) and comfortable walking shoes (most picks involve some walking).
Routes in season in September
- Banff & Jasper Loop Jun – Sep
Planning Banff in September?
Plan it together in TripsCircle: one itinerary, one shared packing list and costs split as you go.