What is the weather like in Grand Teton National Park vs Great Sand Dunes National Park in September?

In September, Grand Teton National Park averages 19°C high / 1°C low with about 58 mm of rain; Great Sand Dunes National Park averages 24°C high / 9°C low with about 24 mm.

Grand Teton National Park vs Great Sand Dunes National Park in September

Great Sand Dunes National Park is the better pick in September — 93 vs 89 on SeasonMap's comfort score. Great Sand Dunes National Park is nice, dry, clean air, while Grand Teton National Park is nice, a little rain, clean air.

Grand Teton National Park vs Great Sand Dunes National Park — September climate, side by side

	🇺🇸 Grand Teton National Park	🇺🇸 Great Sand Dunes National Park
Comfort score	89/100 (A)	93/100 (S)
Feels-like high	17°C	22°C
Avg high / low	19° / 1°	24° / 9°
Rainfall	58 mm	24 mm
Rainy days	7	4
Humidity	61%	46%
Air quality (AQI)	40	37

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

Month by month

Grand Teton National Park 🇺🇸 United Statesnice, a little rain, clean air · best June89
Great Sand Dunes National Park 🇺🇸 United Statesnice, dry, clean air · best September93

Grand Teton National Park vs Great Sand Dunes National Park in September — FAQ

Is September better in Grand Teton National Park or Great Sand Dunes National Park?: Great Sand Dunes National Park is the better pick in September — 93 vs 89 on SeasonMap's comfort score. Great Sand Dunes National Park is nice, dry, clean air, while Grand Teton National Park is nice, a little rain, clean air.
What is the weather like in Grand Teton National Park vs Great Sand Dunes National Park in September?: In September, Grand Teton National Park averages 19°C high / 1°C low with about 58 mm of rain; Great Sand Dunes National Park averages 24°C high / 9°C low with about 24 mm.