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

In September, Denver averages 29°C high / 11°C low with about 24 mm of rain; Phoenix averages 39°C high / 26°C low with about 12 mm.

Denver vs Phoenix in September

Denver is the better pick in September — 90 vs 49 on SeasonMap's comfort score. Denver is warm, dry, clean air, while Phoenix is sweltering, dry, clean air.

Denver vs Phoenix — September climate, side by side

	Denver	Phoenix
Comfort score	90/100 (S)	49/100 (F)
Feels-like high	27°C	38°C
Avg high / low	29° / 11°	39° / 26°
Rainfall	24 mm	12 mm
Rainy days	3	2
Humidity	46%	33%
Air quality (AQI)	38	45

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

Denver vs Phoenix in September — FAQ

Is September better in Denver or Phoenix?: Denver is the better pick in September — 90 vs 49 on SeasonMap's comfort score. Denver is warm, dry, clean air, while Phoenix is sweltering, dry, clean air.
What is the weather like in Denver vs Phoenix in September?: In September, Denver averages 29°C high / 11°C low with about 24 mm of rain; Phoenix averages 39°C high / 26°C low with about 12 mm.