What is the weather like in Boston vs Saint-Pierre in September?

In September, Boston averages 24°C high / 15°C low with about 83 mm of rain; Saint-Pierre averages 18°C high / 12°C low with about 100 mm.

Boston vs Saint-Pierre in September

Boston is the better pick in September — 90 vs 72 on SeasonMap's comfort score. Boston is warm, rainy, clean air, while Saint-Pierre is cool, rainy, clean air.

Boston vs Saint-Pierre — September climate, side by side

	🇺🇸 Boston	Saint-Pierre
Comfort score	90/100 (S)	72/100 (B)
Feels-like high	24°C	15°C
Avg high / low	24° / 15°	18° / 12°
Rainfall	83 mm	100 mm
Rainy days	7	11
Humidity	76%	83%
Air quality (AQI)	46	44

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

Month by month

Boston vs Saint-Pierre in September — FAQ

Is September better in Boston or Saint-Pierre?: Boston is the better pick in September — 90 vs 72 on SeasonMap's comfort score. Boston is warm, rainy, clean air, while Saint-Pierre is cool, rainy, clean air.
What is the weather like in Boston vs Saint-Pierre in September?: In September, Boston averages 24°C high / 15°C low with about 83 mm of rain; Saint-Pierre averages 18°C high / 12°C low with about 100 mm.