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

In September, Indianapolis averages 27°C high / 16°C low with about 64 mm of rain; Philadelphia averages 27°C high / 18°C low with about 101 mm.

Indianapolis vs Philadelphia in September

Indianapolis is the better pick in September — 89 vs 81 on SeasonMap's comfort score. Indianapolis is warm, a little rain, clean air, while Philadelphia is warm, rainy, clean air.

Indianapolis vs Philadelphia — September climate, side by side

	Indianapolis	Philadelphia
Comfort score	89/100 (A)	81/100 (A)
Feels-like high	28°C	28°C
Avg high / low	27° / 16°	27° / 18°
Rainfall	64 mm	101 mm
Rainy days	5	7
Humidity	68%	72%
Air quality (AQI)	42	45

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

Indianapolis vs Philadelphia in September — FAQ

Is September better in Indianapolis or Philadelphia?: Indianapolis is the better pick in September — 89 vs 81 on SeasonMap's comfort score. Indianapolis is warm, a little rain, clean air, while Philadelphia is warm, rainy, clean air.
What is the weather like in Indianapolis vs Philadelphia in September?: In September, Indianapolis averages 27°C high / 16°C low with about 64 mm of rain; Philadelphia averages 27°C high / 18°C low with about 101 mm.