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

In September, Las Vegas averages 36°C high / 23°C low with about 6 mm of rain; Phoenix averages 39°C high / 26°C low with about 12 mm.

Las Vegas vs Phoenix in September

Las Vegas is the better pick in September — 61 vs 49 on SeasonMap's comfort score. Las Vegas is sweltering, dry, clean air, while Phoenix is sweltering, dry, clean air.

Las Vegas vs Phoenix — September climate, side by side

	🇺🇸 Las Vegas	🇺🇸 Phoenix
Comfort score	61/100 (C)	49/100 (F)
Feels-like high	34°C	38°C
Avg high / low	36° / 23°	39° / 26°
Rainfall	6 mm	12 mm
Rainy days	1	2
Humidity	25%	33%
Air quality (AQI)	44	45

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

Month by month

Las Vegas vs Phoenix in September — FAQ

Is September better in Las Vegas or Phoenix?: Las Vegas is the better pick in September — 61 vs 49 on SeasonMap's comfort score. Las Vegas is sweltering, dry, clean air, while Phoenix is sweltering, dry, clean air.
What is the weather like in Las Vegas vs Phoenix in September?: In September, Las Vegas averages 36°C high / 23°C low with about 6 mm of rain; Phoenix averages 39°C high / 26°C low with about 12 mm.