Ottawa Weather in May

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

The climate in Ottawa during May can be summarized as mild and reasonably dry.

May is in the spring in Ottawa and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a cool 18°C (65°F), whilst at night 7°C (45°F) is normal.

Ottawa weather averages (imperial / metric)
Daytime temperature 18.4°C 65.1°F
Nightly temperature 7°C 44.6°F
Average temperature 12.7°C 54.9°F
Daily sunshine 7.9 hrs
Avg rainfall 73 mm 2.9 ins
Rainy days 12 days
Sea temperature 5.6°C 42.1°F
Humidity 63%
Windspeed 12.6kph 8 mph

On average May is the 6th driest month of the year in Ottawa with around 73mm 2.9 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 12 days, although this may vary considerably.

On the flip side this corresponds to an average of 7.9 hours of sunshine per day.

May temperatures in Ottawa

May rainfall

May 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 May 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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