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

In September, Baltimore averages 28°C high / 19°C low with about 106 mm of rain; Philadelphia averages 27°C high / 18°C low with about 101 mm.

Baltimore vs Philadelphia in September

Baltimore and Philadelphia are nearly tied in September — 79 vs 81 on SeasonMap's comfort score. Baltimore is hot, rainy, clean air; Philadelphia is warm, rainy, clean air.

Baltimore vs Philadelphia — September climate, side by side

	🇺🇸 Baltimore	🇺🇸 Philadelphia
Comfort score	79/100 (B)	81/100 (A)
Feels-like high	29°C	28°C
Avg high / low	28° / 19°	27° / 18°
Rainfall	106 mm	101 mm
Rainy days	7	7
Humidity	76%	72%
Air quality (AQI)	45	45

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

Month by month

Baltimore vs Philadelphia in September — FAQ

Is September better in Baltimore or Philadelphia?: Baltimore and Philadelphia are nearly tied in September — 79 vs 81 on SeasonMap's comfort score. Baltimore is hot, rainy, clean air; Philadelphia is warm, rainy, clean air.
What is the weather like in Baltimore vs Philadelphia in September?: In September, Baltimore averages 28°C high / 19°C low with about 106 mm of rain; Philadelphia averages 27°C high / 18°C low with about 101 mm.