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Boston — weather in September, water temperature

22.4°C Daytime temperatures 16.5°C Night temperatures 14 Sunny days 11.8-13.1 Sun (hours) 4 Rainy days 50.7 mm Precipitation 17.9°C water temperature
Air temperature
2022 2021 2020 2019 2018 2017 2016 2015 2014 2013
The maximum daily temperature 34°C — 1 September 2015.
The maximum night temperature 23°C — 10 September 2020.
The minimum daily temperature 13°C — 30 September 2017.
The minimum night temperature 7.5°C — 24 September 2013.
water temperature
2022 2021 2020 2019 2018 2017 2016 2015 2014 2013
The warmest water 22 °C — 1 September 2022. The coldest water 14.8 °C — 25 September 2013.
Sunny, cloudy and gloomy days
Precipitation, mm
Maximum precipitation 87.9 mm — December. Minimum precipitation 50.7 mm — September.
Wind speed, km / h
Maximum wind speed 17.8 km / h — January. Minimum wind speed 12.3 km / h — August.
Number of hours of sunshine
The maximum number of hours of sunshine per day 9.6 h. — July. The minimum number of hours of sunshine per day 4.8 h. — December.
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