Ottawa Weather in December
In December, Ottawa averages a high of -2°C (29°F) and a low of -9°C (15°F), based on 55 years of historical weather data from OTTAWA CDA.
-2°C
Average high
29°F
-9°C
Average low
15°F
17°C
Record high
63°F · 2012
-32°C
Record low
-26°F · 1980
What to Expect in Ottawa in December
Typical December days in Ottawa reach -2°C (29°F) during the afternoon and cool to around -9°C (15°F) overnight. On average, measurable rain falls on about 52% of days this month. Over the past 55 years, December temperatures in Ottawa have ranged from a record high of 17°C (2012) down to a record low of -32°C (1980).
For a day-by-day look or other months, see the full Ottawa weather history.