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Ottawa — weather in September

By months January February March April May June July August September October November December
20°C Daytime temperatures 12.6°C Night temperatures 13 Sunny days 11.7-13.3 Sun (hours) 4 Rainy days 53.4 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 2015.
The maximum night temperature 22°C — 5 September 2015.
The minimum daily temperature 9.3°C — 22 September 2014.
The minimum night temperature 0.5°C — 19 September 2014.
Sunny, cloudy and gloomy days
Precipitation, mm
Maximum precipitation 92.3 mm — April. Minimum precipitation 52.4 mm — November.
Wind speed, km / h
Maximum wind speed 15.8 km / h — April. Minimum wind speed 11.5 km / h — August.
Number of hours of sunshine
The maximum number of hours of sunshine per day 10.3 h. — July. The minimum number of hours of sunshine per day 3.2 h. — December.
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