What is the weather like in Indianapolis vs Louisville in September?

In September, Indianapolis averages 27°C high / 16°C low with about 64 mm of rain; Louisville averages 28°C high / 17°C low with about 106 mm.

Indianapolis vs Louisville in September

Indianapolis is the better pick in September — 89 vs 83 on SeasonMap's comfort score. Indianapolis is warm, a little rain, clean air, while Louisville is hot, rainy, clean air.

Indianapolis vs Louisville — September climate, side by side

	🇺🇸 Indianapolis	🇺🇸 Louisville
Comfort score	89/100 (A)	83/100 (A)
Feels-like high	28°C	30°C
Avg high / low	27° / 16°	28° / 17°
Rainfall	64 mm	106 mm
Rainy days	5	7
Humidity	68%	71%
Air quality (AQI)	42	43

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

Month by month

Indianapolis vs Louisville in September — FAQ

Is September better in Indianapolis or Louisville?: Indianapolis is the better pick in September — 89 vs 83 on SeasonMap's comfort score. Indianapolis is warm, a little rain, clean air, while Louisville is hot, rainy, clean air.
What is the weather like in Indianapolis vs Louisville in September?: In September, Indianapolis averages 27°C high / 16°C low with about 64 mm of rain; Louisville averages 28°C high / 17°C low with about 106 mm.