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

In September, Grand Canyon National Park averages 35°C high / 19°C low with about 14 mm of rain; Zion National Park averages 27°C high / 11°C low with about 19 mm.

Grand Canyon National Park vs Zion National Park in September

Zion National Park is the better pick in September — 89 vs 52 on SeasonMap's comfort score. Zion National Park is warm, dry, clean air, while Grand Canyon National Park is hot, dry, clean air.

Grand Canyon National Park vs Zion National Park — September climate, side by side

	🇺🇸 Grand Canyon National Park	🇺🇸 Zion National Park
Comfort score	52/100 (D)	89/100 (A)
Feels-like high	33°C	24°C
Avg high / low	35° / 19°	27° / 11°
Rainfall	14 mm	19 mm
Rainy days	2	2
Humidity	34%	33%
Air quality (AQI)	38	41

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

Month by month

Grand Canyon National Park vs Zion National Park in September — FAQ

Is September better in Grand Canyon National Park or Zion National Park?: Zion National Park is the better pick in September — 89 vs 52 on SeasonMap's comfort score. Zion National Park is warm, dry, clean air, while Grand Canyon National Park is hot, dry, clean air.
What is the weather like in Grand Canyon National Park vs Zion National Park in September?: In September, Grand Canyon National Park averages 35°C high / 19°C low with about 14 mm of rain; Zion National Park averages 27°C high / 11°C low with about 19 mm.