The climate in Ottawa during December can be summarized as cold and a little damp.
December is in the winter in Ottawa and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a freezing -4°C (25°F), whilst at night -11°C (12°F) is normal.
|Daytime temperature||-3.7°C 25.4°F|
|Nightly temperature||-11.4°C 11.6°F|
|Average temperature||-7.5°C 18.5°F|
|Daily sunshine||2.8 hrs|
|Avg rainfall||82 mm 3.2 ins|
|Rainy days||16 days|
|Sea temperature||5.1°C 41.1°F|
|Windspeed||13.7kph 9 mph|
On average December is the 5th wettest month of the year in Ottawa with around 82mm 3.2 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 16 days, although this may vary considerably.
On the flip side this corresponds to an average of 2.8 hours of sunshine per day.
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 December 2019.
|Hottest month:||July||25.9°C 78.6°F|
|Driest month:||February||58mm 2.3ins|
|Coldest month:||January||-6.6°C 20.1°F|
|Wettest month:||July||88mm 3.5ins|