What is the weather like in Aspen vs Banff in September?

In September, Aspen averages 22°C high / 6°C low with about 30 mm of rain; Banff averages 18°C high / 3°C low with about 51 mm.

Aspen vs Banff in September

Aspen and Banff are nearly tied in September — 20 vs 22 on SeasonMap's comfort score. Aspen is nice, a little rain, clean air; Banff is nice, a little rain, clean air.

Aspen vs Banff — September climate, side by side

	🇺🇸 Aspen	🇨🇦 Banff
Comfort score	20/100 (F)	22/100 (F)
Feels-like high	20°C	16°C
Avg high / low	22° / 6°	18° / 3°
Rainfall	30 mm	51 mm
Rainy days	6	10
Humidity	55%	72%
Air quality (AQI)	44	36

Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.

Month by month

Aspen 🇺🇸 United Statesnice, a little rain, clean air · best January20
Banff 🇨🇦 Canadanice, a little rain, clean air · best February22

Aspen vs Banff in September — FAQ

Is September better in Aspen or Banff?: Aspen and Banff are nearly tied in September — 20 vs 22 on SeasonMap's comfort score. Aspen is nice, a little rain, clean air; Banff is nice, a little rain, clean air.
What is the weather like in Aspen vs Banff in September?: In September, Aspen averages 22°C high / 6°C low with about 30 mm of rain; Banff averages 18°C high / 3°C low with about 51 mm.