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Siena — weather in September

By months January February March April May June July August September October November December
25.5°C Daytime temperatures 14.7°C Night temperatures 21 Sunny days 11.8-13.2 Sun (hours) 4 Rainy days 53.2 mm Precipitation 0°C water temperature
Air temperature
2022 2021 2020 2019 2018 2017 2016 2015 2014 2013
The maximum daily temperature 33.5°C — 5 September 2022.
The maximum night temperature 22°C — 1 September 2017.
The minimum daily temperature 10.5°C — 27 September 2020.
The minimum night temperature 7°C — 23 September 2022.
Sunny, cloudy and gloomy days
Precipitation, mm
Maximum precipitation 70.3 mm — November. Minimum precipitation 28.9 mm — August.
Wind speed, km / h
Maximum wind speed 11.1 km / h — March. Minimum wind speed 7.8 km / h — December.
Number of hours of sunshine
The maximum number of hours of sunshine per day 13 h. — July. The minimum number of hours of sunshine per day 5.1 h. — December.
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