What is the weather like in Flagstaff vs Las Vegas in September?

In September, Flagstaff averages 24°C high / 9°C low with about 30 mm of rain; Las Vegas averages 36°C high / 23°C low with about 6 mm.

Flagstaff vs Las Vegas in September

Flagstaff is the better pick in September — 94 vs 61 on SeasonMap's comfort score. Flagstaff is nice, dry, clean air, while Las Vegas is sweltering, dry, clean air.

Flagstaff vs Las Vegas — September climate, side by side

	🇺🇸 Flagstaff	🇺🇸 Las Vegas
Comfort score	94/100 (S)	61/100 (C)
Feels-like high	23°C	34°C
Avg high / low	24° / 9°	36° / 23°
Rainfall	30 mm	6 mm
Rainy days	5	1
Humidity	49%	25%
Air quality (AQI)	41	44

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

Month by month

Flagstaff vs Las Vegas in September — FAQ

Is September better in Flagstaff or Las Vegas?: Flagstaff is the better pick in September — 94 vs 61 on SeasonMap's comfort score. Flagstaff is nice, dry, clean air, while Las Vegas is sweltering, dry, clean air.
What is the weather like in Flagstaff vs Las Vegas in September?: In September, Flagstaff averages 24°C high / 9°C low with about 30 mm of rain; Las Vegas averages 36°C high / 23°C low with about 6 mm.