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

In September, Boise averages 27°C high / 12°C low with about 8 mm of rain; Great Sand Dunes National Park averages 24°C high / 9°C low with about 24 mm.

Boise vs Great Sand Dunes National Park in September

Boise and Great Sand Dunes National Park are nearly tied in September — 94 vs 93 on SeasonMap's comfort score. Boise is warm, dry, clean air; Great Sand Dunes National Park is nice, dry, clean air.

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

	🇺🇸 Boise	🇺🇸 Great Sand Dunes National Park
Comfort score	94/100 (S)	93/100 (S)
Feels-like high	25°C	22°C
Avg high / low	27° / 12°	24° / 9°
Rainfall	8 mm	24 mm
Rainy days	3	4
Humidity	41%	46%
Air quality (AQI)	40	37

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

Month by month

Boise vs Great Sand Dunes National Park in September — FAQ

Is September better in Boise or Great Sand Dunes National Park?: Boise and Great Sand Dunes National Park are nearly tied in September — 94 vs 93 on SeasonMap's comfort score. Boise is warm, dry, clean air; Great Sand Dunes National Park is nice, dry, clean air.
What is the weather like in Boise vs Great Sand Dunes National Park in September?: In September, Boise averages 27°C high / 12°C low with about 8 mm of rain; Great Sand Dunes National Park averages 24°C high / 9°C low with about 24 mm.