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Ottawa weather in September 2023
- 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 Ontario (Ottawa) 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.
Metric (°C / mm) | Imperial (°F / inches)
More about Canada
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 September sunrise & sunset times
Browse the sunrise and sunset times for Ottawa in September 2023. Select a month to view Ottawa sunrise and sunset times for the next 12 months.
|Date||Sunrise times||Sunset times|
|Friday, 1st September 2023||06:24||19:41|
|Friday, 15th September 2023||06:41||19:14|
|Saturday, 30th September 2023||06:59||18:45|
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