What is the weather like in Boston vs St. John's, Newfoundland in September?

In September, Boston averages 24°C high / 15°C low with about 83 mm of rain; St. John's, Newfoundland averages 18°C high / 9°C low with about 91 mm.

Boston vs St. John's, Newfoundland in September

Boston is the better pick in September — 90 vs 77 on SeasonMap's comfort score. Boston is warm, rainy, clean air, while St. John's, Newfoundland is nice, rainy, clean air.

Boston vs St. John's, Newfoundland — September climate, side by side

	🇺🇸 Boston	🇨🇦 St. John's, Newfoundland
Comfort score	90/100 (S)	77/100 (B)
Feels-like high	24°C	17°C
Avg high / low	24° / 15°	18° / 9°
Rainfall	83 mm	91 mm
Rainy days	7	10
Humidity	76%	81%
Air quality (AQI)	46	36

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

Month by month

Boston vs St. John's, Newfoundland in September — FAQ

Is September better in Boston or St. John's, Newfoundland?: Boston is the better pick in September — 90 vs 77 on SeasonMap's comfort score. Boston is warm, rainy, clean air, while St. John's, Newfoundland is nice, rainy, clean air.
What is the weather like in Boston vs St. John's, Newfoundland in September?: In September, Boston averages 24°C high / 15°C low with about 83 mm of rain; St. John's, Newfoundland averages 18°C high / 9°C low with about 91 mm.