Ottawa Weather in August

What's the weather like in Ottawa, Canada in August?

The climate in Ottawa during August can be summarized as warm and a little damp.

August is in the summer in Ottawa and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around 25°C (76°F), whilst at night 14°C (57°F) is normal.

Ottawa weather averages (imperial / metric)
Daytime temperature 24.6°C 76.2°F
Nightly temperature 13.9°C 56.9°F
Average temperature 19.2°C 66.6°F
Daily sunshine 8.3 hrs
Avg rainfall 86 mm 3.4 ins
Rainy days 11 days
Sea temperature 18°C 64.4°F
Humidity 73%
Windspeed 10.4kph 7 mph

On average August is the 2nd wettest month of the year in Ottawa with around 86mm 3.4 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 11 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.3 hours of sunshine per day.

August temperatures in Ottawa

August rainfall

August hourly sunshine

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 August 2018.

Other monthly averages

Ottawa weather stats

Ottawa weather statistics
Hottest month: July 25.9°C 78.6°F
Driest month: February 58mm 2.3ins
Sunniest month: July 9.7hrs
Coldest month: January -6.6°C 20.1°F
Wettest month: July 88mm 3.5ins
Map showing location of Ottawa (45.41117, -75.69812)

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