Climate almanac
Boston
New York, United States · 42.63°, -78.74°
What is the weather like in Boston in September?
In September, Boston is typically 73°F (23°C) during the day and 57°F (14°C) at night. The month brings about 2.8 in (72 mm) of precipitation in total.
- Average high73°F (23°C)
- Average low57°F (14°C)
- Precipitation2.8 in (72 mm)
- Clear or mostly clear days11
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)