Banff weather in September
September is a fair month to visit Banff: highs of 11°C (52°F) and about 69 mm (2.7 in) of rain on average. Nights average 0°C (32°F) and cloud cover 62% (NASA POWER, 2001–2025 averages). It is the 4th wettest month of the year and the 4th warmest. Compared with August, it is cooler and about as wet; October brings highs of 3°C (37°F) and 61 mm (2.4 in) of rain.
Is September a good time to visit Banff?
fair month Weather score 49/100.
September is a fair month in Banff. The weather is usually best in Jul–Aug.
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Does it rain a lot in Banff in September?
Some rain is normal: about 69 mm (2.7 in) falls in an average September. It is the 4th wettest month of the year.
How warm is Banff in September?
Days average 11°C (52°F) and nights 0°C (32°F).
Banff weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | -9°C (17°F) | -17°C (1°F) | 45 mm | 70% | least pleasant |
| February | -8°C (18°F) | -18°C (0°F) | 42 mm | 69% | least pleasant |
| March | -4°C (25°F) | -14°C (7°F) | 61 mm | 72% | least pleasant |
| April | 0°C (32°F) | -9°C (16°F) | 62 mm | 72% | least pleasant |
| May | 8°C (47°F) | -2°C (29°F) | 83 mm | 70% | least pleasant |
| June | 13°C (56°F) | 2°C (36°F) | 121 mm | 70% | least pleasant |
| July | 17°C (63°F) | 6°C (42°F) | 70 mm | 56% | best |
| August | 17°C (62°F) | 5°C (41°F) | 63 mm | 56% | best |
| September | 11°C (52°F) | 0°C (32°F) | 69 mm | 62% | fair |
| October | 3°C (37°F) | -6°C (22°F) | 61 mm | 68% | least pleasant |
| November | -5°C (23°F) | -13°C (8°F) | 60 mm | 71% | least pleasant |
| December | -10°C (14°F) | -18°C (-1°F) | 48 mm | 68% | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
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