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Ottawa weather in September 2021
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- 2020°C max day temperature
- 1212 days with some rainfall
- 99°C min night temperature
- 1212 hours of daylight per day
- 0No heat & humidity
- 8080 mm of monthly rainfall
- 55 (Moderate) UV index
Recommended for Ontario
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.
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.
Metric (°C / mm) | Imperial (°F / inches)
Ottawa sunrise & sunset times for September 2021
Browse the sunrise and sunset times for Ottawa in September 2021. Select a month to view Ottawa sunrise & sunset times for the next 12 months.
|Date||Sunrise times||Sunset times|
|Wednesday, 1st September 2021||06:25||19:40|
|Wednesday, 15th September 2021||06:42||19:13|
|Thursday, 30th September 2021||07:00||18:44|
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