What is the weather like in Chicago vs Gateway Arch National Park in October?

In October, Chicago averages 18°C high / 9°C low with about 117 mm of rain; Gateway Arch National Park averages 22°C high / 8°C low with about 72 mm.

Chicago vs Gateway Arch National Park in October

Gateway Arch National Park is the better pick in October — 87 vs 73 on SeasonMap's comfort score. Gateway Arch National Park is nice, a little rain, clean air, while Chicago is nice, rainy, clean air.

Chicago vs Gateway Arch National Park — October climate, side by side

	🇺🇸 Chicago	🇺🇸 Gateway Arch National Park
Comfort score	73/100 (B)	87/100 (A)
Feels-like high	16°C	20°C
Avg high / low	18° / 9°	22° / 8°
Rainfall	117 mm	72 mm
Rainy days	10	6
Humidity	70%	66%
Air quality (AQI)	35	36

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

Month by month

Chicago vs Gateway Arch National Park in October — FAQ

Is October better in Chicago or Gateway Arch National Park?: Gateway Arch National Park is the better pick in October — 87 vs 73 on SeasonMap's comfort score. Gateway Arch National Park is nice, a little rain, clean air, while Chicago is nice, rainy, clean air.
What is the weather like in Chicago vs Gateway Arch National Park in October?: In October, Chicago averages 18°C high / 9°C low with about 117 mm of rain; Gateway Arch National Park averages 22°C high / 8°C low with about 72 mm.