Ottawa weather in September 2020

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  • 20°C maximum daytime temperature in September in Ottawa20
    20°C max day temperature
  • 6 hours of sunshine per day
  • 12 days with some rainfall in September in Ottawa12
    12 days with some rainfall
  • 9°C minimum night-time temperature in September in Ottawa9
    9°C min night temperature
  • 12 hours of daylight per day in September in Ottawa12
    12 hours of daylight per day
  • No heat & humidity in September in Ottawa0
    No heat & humidity
  • 80 mm monthly rainfall in September in Ottawa80
    80 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Ottawa5
    5 (Moderate) UV index
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The September weather guide for Ottawa, Ontario shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

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How hot is it in Ottawa in September?

Daytime temperatures usually reach 20°C in Ottawa in September, falling to 9°C at night.

How sunny is it in Ottawa in September?

There are normally 6 hours of bright sunshine each day in Ottawa in September - that's 46% of daylight hours.

Does it rain in Ottawa in September?

There are usually 12 days with some rain in Ottawa in September and the average monthly rainfall is 80mm.

Ottawa sunrise & sunset times for September 2020

Browse the sunrise & sunset times for Ottawa in September 2020. Select a month to view Ottawa sunrise & sunset times for the next twelve months.


Date Sunrise times Sunset times
Tuesday, 1st September 2020 06:25 19:39
Tuesday, 15th September 2020 06:42 19:13
Wednesday, 30th September 2020 07:00 18:44
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Metric (°C / mm)  |  Imperial (°F / inches)

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Where is hot in Ontario in September for 2020/2021?

Below are average maximum temperatures at popular destinations in Ontario in September. Select a destination to see more weather parameters.

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