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

In September, Flagstaff averages 24°C high / 9°C low with about 30 mm of rain; Phoenix averages 39°C high / 26°C low with about 12 mm.

Flagstaff vs Phoenix in September

Flagstaff is the better pick in September — 94 vs 49 on SeasonMap's comfort score. Flagstaff is nice, dry, clean air, while Phoenix is sweltering, dry, clean air.

Flagstaff vs Phoenix — September climate, side by side

	🇺🇸 Flagstaff	🇺🇸 Phoenix
Comfort score	94/100 (S)	49/100 (F)
Feels-like high	23°C	38°C
Avg high / low	24° / 9°	39° / 26°
Rainfall	30 mm	12 mm
Rainy days	5	2
Humidity	49%	33%
Air quality (AQI)	41	45

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

Month by month

Flagstaff vs Phoenix in September — FAQ

Is September better in Flagstaff or Phoenix?: Flagstaff is the better pick in September — 94 vs 49 on SeasonMap's comfort score. Flagstaff is nice, dry, clean air, while Phoenix is sweltering, dry, clean air.
What is the weather like in Flagstaff vs Phoenix in September?: In September, Flagstaff averages 24°C high / 9°C low with about 30 mm of rain; Phoenix averages 39°C high / 26°C low with about 12 mm.