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

In September, Baltimore averages 28°C high / 19°C low with about 106 mm of rain; Boston averages 24°C high / 15°C low with about 83 mm.

Baltimore vs Boston in September

Boston is the better pick in September — 90 vs 79 on SeasonMap's comfort score. Boston is warm, rainy, clean air, while Baltimore is hot, rainy, clean air.

Baltimore vs Boston — September climate, side by side

	🇺🇸 Baltimore	🇺🇸 Boston
Comfort score	79/100 (B)	90/100 (S)
Feels-like high	29°C	24°C
Avg high / low	28° / 19°	24° / 15°
Rainfall	106 mm	83 mm
Rainy days	7	7
Humidity	76%	76%
Air quality (AQI)	45	46

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

Month by month

Baltimore 🇺🇸 United Stateshot, rainy, clean air · best May79
Boston 🇺🇸 United Stateswarm, rainy, clean air · best September90

Baltimore vs Boston in September — FAQ

Is September better in Baltimore or Boston?: Boston is the better pick in September — 90 vs 79 on SeasonMap's comfort score. Boston is warm, rainy, clean air, while Baltimore is hot, rainy, clean air.
What is the weather like in Baltimore vs Boston in September?: In September, Baltimore averages 28°C high / 19°C low with about 106 mm of rain; Boston averages 24°C high / 15°C low with about 83 mm.