The weather in Banff in September is very cold with temperatures between 2°C and 10°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Banff during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Please note that Banff can expect a few days of snow in September.
Our weather forecast can give you a great sense of what weather to expect in Banff in September 2025.
If you’re planning to visit Banff in the near future, we highly recommend that you review the 14 day weather forecast for Banff before you arrive.
Temperatures
10° / 2°
Rainy Days
7
Snowy Days
2
Dry Days
20
Rainfall
83
mm
Sun Hours
10.8
Hrs
