What is the weather like in Grand Canyon National Park vs Las Vegas in September?

In September, Grand Canyon National Park averages 35°C high / 19°C low with about 14 mm of rain; Las Vegas averages 36°C high / 23°C low with about 6 mm.

Grand Canyon National Park vs Las Vegas in September

Las Vegas is the better pick in September — 61 vs 52 on SeasonMap's comfort score. Las Vegas is sweltering, dry, clean air, while Grand Canyon National Park is hot, dry, clean air.

Grand Canyon National Park vs Las Vegas — September climate, side by side

	🇺🇸 Grand Canyon National Park	🇺🇸 Las Vegas
Comfort score	52/100 (D)	61/100 (C)
Feels-like high	33°C	34°C
Avg high / low	35° / 19°	36° / 23°
Rainfall	14 mm	6 mm
Rainy days	2	1
Humidity	34%	25%
Air quality (AQI)	38	44

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

Month by month

Grand Canyon National Park vs Las Vegas in September — FAQ

Is September better in Grand Canyon National Park or Las Vegas?: Las Vegas is the better pick in September — 61 vs 52 on SeasonMap's comfort score. Las Vegas is sweltering, dry, clean air, while Grand Canyon National Park is hot, dry, clean air.
What is the weather like in Grand Canyon National Park vs Las Vegas in September?: In September, Grand Canyon National Park averages 35°C high / 19°C low with about 14 mm of rain; Las Vegas averages 36°C high / 23°C low with about 6 mm.