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

In September, Philadelphia averages 27°C high / 18°C low with about 101 mm of rain; Pittsburgh averages 26°C high / 14°C low with about 86 mm.

Philadelphia vs Pittsburgh in September

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

Philadelphia vs Pittsburgh — September climate, side by side

	🇺🇸 Philadelphia	🇺🇸 Pittsburgh
Comfort score	81/100 (A)	89/100 (A)
Feels-like high	28°C	27°C
Avg high / low	27° / 18°	26° / 14°
Rainfall	101 mm	86 mm
Rainy days	7	8
Humidity	72%	75%
Air quality (AQI)	45	43

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

Month by month

Philadelphia vs Pittsburgh in September — FAQ

Is September better in Philadelphia or Pittsburgh?: Pittsburgh is the better pick in September — 89 vs 81 on SeasonMap's comfort score. Pittsburgh is warm, rainy, clean air, while Philadelphia is warm, rainy, clean air.
What is the weather like in Philadelphia vs Pittsburgh in September?: In September, Philadelphia averages 27°C high / 18°C low with about 101 mm of rain; Pittsburgh averages 26°C high / 14°C low with about 86 mm.