What is the weather like in Baltimore vs Chicago in September?

In September, Baltimore averages 28°C high / 19°C low with about 106 mm of rain; Chicago averages 25°C high / 17°C low with about 63 mm.

Baltimore vs Chicago in September

Chicago is the better pick in September — 91 vs 79 on SeasonMap's comfort score. Chicago is warm, a little rain, clean air, while Baltimore is hot, rainy, clean air.

Baltimore vs Chicago — September climate, side by side

	Baltimore	Chicago
Comfort score	79/100 (B)	91/100 (S)
Feels-like high	29°C	25°C
Avg high / low	28° / 19°	25° / 17°
Rainfall	106 mm	63 mm
Rainy days	7	7
Humidity	76%	73%
Air quality (AQI)	45	45

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

Baltimore vs Chicago in September — FAQ

Is September better in Baltimore or Chicago?: Chicago is the better pick in September — 91 vs 79 on SeasonMap's comfort score. Chicago is warm, a little rain, clean air, while Baltimore is hot, rainy, clean air.
What is the weather like in Baltimore vs Chicago in September?: In September, Baltimore averages 28°C high / 19°C low with about 106 mm of rain; Chicago averages 25°C high / 17°C low with about 63 mm.