What is the weather like in Calgary vs Denver in September?

In September, Calgary averages 20°C high / 6°C low with about 27 mm of rain; Denver averages 29°C high / 11°C low with about 24 mm.

Calgary vs Denver in September

Denver is the better pick in September — 90 vs 86 on SeasonMap's comfort score. Denver is warm, dry, clean air, while Calgary is nice, dry, clean air.

Calgary vs Denver — September climate, side by side

	🇨🇦 Calgary	🇺🇸 Denver
Comfort score	86/100 (A)	90/100 (S)
Feels-like high	17°C	27°C
Avg high / low	20° / 6°	29° / 11°
Rainfall	27 mm	24 mm
Rainy days	5	3
Humidity	63%	46%
Air quality (AQI)	41	38

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

Month by month

Calgary 🇨🇦 Canadanice, dry, clean air · best August86
Denver 🇺🇸 United Stateswarm, dry, clean air · best September90

Calgary vs Denver in September — FAQ

Is September better in Calgary or Denver?: Denver is the better pick in September — 90 vs 86 on SeasonMap's comfort score. Denver is warm, dry, clean air, while Calgary is nice, dry, clean air.
What is the weather like in Calgary vs Denver in September?: In September, Calgary averages 20°C high / 6°C low with about 27 mm of rain; Denver averages 29°C high / 11°C low with about 24 mm.