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

In September, Boston averages 24°C high / 15°C low with about 83 mm of rain; Hyannis averages 23°C high / 14°C low with about 113 mm.

Boston vs Hyannis in September

Boston is the better pick in September — 90 vs 78 on SeasonMap's comfort score. Boston is warm, rainy, clean air, while Hyannis is nice, rainy, clean air.

Boston vs Hyannis — September climate, side by side

	🇺🇸 Boston	🇺🇸 Hyannis
Comfort score	90/100 (S)	78/100 (B)
Feels-like high	24°C	23°C
Avg high / low	24° / 15°	23° / 14°
Rainfall	83 mm	113 mm
Rainy days	7	8
Humidity	76%	80%
Air quality (AQI)	46	43

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

Month by month

Boston 🇺🇸 United Stateswarm, rainy, clean air · best September90
Hyannis 🇺🇸 United Statesnice, rainy, clean air · best July78

Boston vs Hyannis in September — FAQ

Is September better in Boston or Hyannis?: Boston is the better pick in September — 90 vs 78 on SeasonMap's comfort score. Boston is warm, rainy, clean air, while Hyannis is nice, rainy, clean air.
What is the weather like in Boston vs Hyannis in September?: In September, Boston averages 24°C high / 15°C low with about 83 mm of rain; Hyannis averages 23°C high / 14°C low with about 113 mm.