September weather in Boston, United States
Averages from 150 days in September across 2020–2024.
Typical conditions
| Average high | 23°C |
|---|---|
| Average low | 14.5°C |
| Average mean | 18.5°C |
| Total precipitation | 632.4 mm |
| Rainy days | 81 |
| Average precipitation hours | 3.7 h |
| Average max wind speed | 18.4 km/h |
| Average sunshine | 8.9 h/day |
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