Ottawa Weather in September

What's the weather like in Ottawa (Kansas) in September 2024?

The climate in Ottawa during September can be summarized as warm, humid and damp.

September is in the fall / autumn in Ottawa and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a muggy 27°C (81°F), whilst at night 14°C (58°F) is normal.

Ottawa weather averages (imperial / metric)
Daytime temperature 27.4°C 81.3°F
Nightly temperature 14.4°C 57.9°F
Average temperature 20.9°C 69.6°F
Daily sunshine 8.4 hrs
Avg rainfall 114 mm 4.5 ins
Rainy days 8 days
Sea temperature 20.6°C 69.1°F
Humidity 71%
Windspeed 15.1kph 9 mph

On average September is the 3rd wettest month of the year in Ottawa with around 114mm 4.5 inches of rain making it a damp time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.4 hours of sunshine per day.

September temperatures in Ottawa

Ottawa average temperature in September

September rainfall

Ottawa average rain in September

September hourly sunshine

Ottawa average rain in September

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Ottawa in September 2024.

Other monthly averages

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UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Ottawa weather stats

Ottawa weather statistics
Hottest month: July 32.5°C 90.5°F
Driest month: February 31mm 1.2ins
Sunniest month: July 11.3hrs
Coldest month: January 3.8°C 38.8°F
Wettest month: June 142mm 5.6ins
Map showing location of Ottawa (38.61557, -95.26775) Ottawa map pin © Google

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