What is the weather like in Chicago vs St. Louis in October?

In October, Chicago averages 18°C high / 9°C low with about 117 mm of rain; St. Louis averages 22°C high / 8°C low with about 71 mm.

Chicago vs St. Louis in October

St. Louis is the better pick in October — 84 vs 73 on SeasonMap's comfort score. St. Louis is nice, a little rain, clean air, while Chicago is nice, rainy, clean air.

Chicago vs St. Louis — October climate, side by side

	Chicago	St. Louis
Comfort score	73/100 (B)	84/100 (A)
Feels-like high	16°C	20°C
Avg high / low	18° / 9°	22° / 8°
Rainfall	117 mm	71 mm
Rainy days	10	6
Humidity	70%	66%
Air quality (AQI)	35	36

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

Chicago vs St. Louis in October — FAQ

Is October better in Chicago or St. Louis?: St. Louis is the better pick in October — 84 vs 73 on SeasonMap's comfort score. St. Louis is nice, a little rain, clean air, while Chicago is nice, rainy, clean air.
What is the weather like in Chicago vs St. Louis in October?: In October, Chicago averages 18°C high / 9°C low with about 117 mm of rain; St. Louis averages 22°C high / 8°C low with about 71 mm.