What is the weather like in Detroit vs Gateway Arch National Park in September?

In September, Detroit averages 25°C high / 16°C low with about 88 mm of rain; Gateway Arch National Park averages 29°C high / 15°C low with about 89 mm.

Detroit vs Gateway Arch National Park in September

Detroit is the better pick in September — 90 vs 81 on SeasonMap's comfort score. Detroit is warm, rainy, clean air, while Gateway Arch National Park is hot, rainy, clean air.

Detroit vs Gateway Arch National Park — September climate, side by side

	🇺🇸 Detroit	🇺🇸 Gateway Arch National Park
Comfort score	90/100 (S)	81/100 (A)
Feels-like high	24°C	30°C
Avg high / low	25° / 16°	29° / 15°
Rainfall	88 mm	89 mm
Rainy days	6	5
Humidity	73%	67%
Air quality (AQI)	45	50

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

Month by month

Detroit vs Gateway Arch National Park in September — FAQ

Is September better in Detroit or Gateway Arch National Park?: Detroit is the better pick in September — 90 vs 81 on SeasonMap's comfort score. Detroit is warm, rainy, clean air, while Gateway Arch National Park is hot, rainy, clean air.
What is the weather like in Detroit vs Gateway Arch National Park in September?: In September, Detroit averages 25°C high / 16°C low with about 88 mm of rain; Gateway Arch National Park averages 29°C high / 15°C low with about 89 mm.