What is the weather like in Cincinnati vs St. Louis in September?

In September, Cincinnati averages 27°C high / 14°C low with about 65 mm of rain; St. Louis averages 29°C high / 15°C low with about 83 mm.

Cincinnati vs St. Louis in September

Cincinnati is the better pick in September — 89 vs 85 on SeasonMap's comfort score. Cincinnati is warm, a little rain, clean air, while St. Louis is hot, rainy, clean air.

Cincinnati vs St. Louis — September climate, side by side

	🇺🇸 Cincinnati	🇺🇸 St. Louis
Comfort score	89/100 (A)	85/100 (A)
Feels-like high	28°C	30°C
Avg high / low	27° / 14°	29° / 15°
Rainfall	65 mm	83 mm
Rainy days	6	5
Humidity	69%	67%
Air quality (AQI)	46	50

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

Month by month

Cincinnati vs St. Louis in September — FAQ

Is September better in Cincinnati or St. Louis?: Cincinnati is the better pick in September — 89 vs 85 on SeasonMap's comfort score. Cincinnati is warm, a little rain, clean air, while St. Louis is hot, rainy, clean air.
What is the weather like in Cincinnati vs St. Louis in September?: In September, Cincinnati averages 27°C high / 14°C low with about 65 mm of rain; St. Louis averages 29°C high / 15°C low with about 83 mm.