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

In September, Atlanta averages 29°C high / 20°C low with about 92 mm of rain; Chicago averages 25°C high / 17°C low with about 63 mm.

Atlanta vs Chicago in September

Chicago is the better pick in September — 91 vs 80 on SeasonMap's comfort score. Chicago is warm, a little rain, clean air, while Atlanta is hot, rainy.

Atlanta vs Chicago — September climate, side by side

	Atlanta	Chicago
Comfort score	80/100 (A)	91/100 (S)
Feels-like high	31°C	25°C
Avg high / low	29° / 20°	25° / 17°
Rainfall	92 mm	63 mm
Rainy days	5	7
Humidity	70%	73%
Air quality (AQI)	55	45

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

Atlanta vs Chicago in September — FAQ

Is September better in Atlanta or Chicago?: Chicago is the better pick in September — 91 vs 80 on SeasonMap's comfort score. Chicago is warm, a little rain, clean air, while Atlanta is hot, rainy.
What is the weather like in Atlanta vs Chicago in September?: In September, Atlanta averages 29°C high / 20°C low with about 92 mm of rain; Chicago averages 25°C high / 17°C low with about 63 mm.