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Heidelberg — weather in September

20°C Daytime temperatures 12.4°C Night temperatures 14 Sunny days 11.7-13.5 Sun (hours) 3 Rainy days 45.1 mm Precipitation 0°C water temperature
Air temperature
2022 2021 2020 2019 2018 2017 2016 2015 2014 2013
The maximum daily temperature 29.7°C — 13 September 2016.
The maximum night temperature 21.5°C — 15 September 2016.
The minimum daily temperature 10°C — 26 September 2020.
The minimum night temperature 5°C — 23 September 2014.
Sunny, cloudy and gloomy days
Precipitation, mm
Maximum precipitation 73.9 mm — June. Minimum precipitation 33.3 mm — April.
Wind speed, km / h
Maximum wind speed 12.9 km / h — February. Minimum wind speed 9 km / h — September.
Number of hours of sunshine
The maximum number of hours of sunshine per day 10 h. — July. The minimum number of hours of sunshine per day 3.1 h. — January.
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