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Basle — weather in September

20.5°C Daytime temperatures 11.2°C Night temperatures 15 Sunny days 11.7-13.4 Sun (hours) 3 Rainy days 44.7 mm Precipitation 0°C water temperature
Air temperature
2022 2021 2020 2019 2018 2017 2016 2015 2014 2013
The maximum daily temperature 30°C — 5 September 2013.
The maximum night temperature 19.5°C — 12 September 2018.
The minimum daily temperature 9.5°C — 26 September 2020.
The minimum night temperature 4°C — 24 September 2014.
Sunny, cloudy and gloomy days
Precipitation, mm
Maximum precipitation 92.9 mm — June. Minimum precipitation 44.7 mm — September.
Wind speed, km / h
Maximum wind speed 9.5 km / h — February. Minimum wind speed 6.9 km / h — August.
Number of hours of sunshine
The maximum number of hours of sunshine per day 10.4 h. — July. The minimum number of hours of sunshine per day 4.1 h. — January.
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