December weather forecast and climate
Ottawa, Canada

A view of The Parliament Hill from the Ottawa River in Ottawa, Canada
A view of The Parliament Hill from the Ottawa River in Ottawa, Canada

What is the temperature in December in Ottawa?

The average high-temperature, in December, in Ottawa, is -2.3°C (27.9°F), while the average low-temperature is -10.1°C (13.8°F).

How much does it rain in Ottawa in December?

In December, the rain falls for 6 days. Throughout December, 33.5mm (1.3") of precipitation is accumulated.

How many days does it snow in December in Ottawa?

In Ottawa, in December, during 14.7 snowfall days, typically, 525mm (20.7") of snow is accumulated.
Average temperature in December - Ottawa, Canada
  • Average high temperature in December: -2.3°C

The warmest month (with the highest average high temperature) is July (26.5°C).
The month with the lowest average high temperature is January (-5.8°C).

  • Average low temperature in December: -10.1°C

The month with the highest average low temperature is July (15.5°C).
The coldest month (with the lowest average low temperature) is January (-14.8°C).

Average humidity in December - Ottawa, Canada
  • Average humidity in December: 72.2%

The month with the highest relative humidity is December (72.2%).
The month with the lowest relative humidity is May (49.9%).

Average rainfall in December - Ottawa, Canada
  • Average rainfall in December: 33.5mm

The wettest month (with the highest rainfall) is June (92.8mm).
The driest month (with the lowest rainfall) is February (18.7mm).

Average rainfall days in December - Ottawa, Canada
  • Average rainfall days in December: 6 days

The month with the highest number of rainy days is October (13.7 days).
The month with the lowest number of rainy days is February (3.9 days).

Average snowfall in December - Ottawa, Canada
  • Average snowfall in December: 525mm

The month with the highest snowfall is January (539mm).
Months with the lowest snowfall are June, July, August and September (0mm).

Average snowfall days in December - Ottawa, Canada
  • Average snowfall days in December: 14.7 days

The month with the highest number of snowfall days is January (16.1 days).
Months with the lowest number of snowfall days are June, July, August and September (0 days).

Average daylight in December / Average sunshine in December - Ottawa, Canada
  • Average daylight in December: 8.8h

The month with the longest days is June (Average daylight: 15.6h).
The month with shortest days is December (Average daylight: 8.8h).

  • Average sunshine in December: 2.2h

The month with most sunshine is July (Average sunshine: 9.7h).
The month with least sunshine is December (Average sunshine: 2.2h).

Average UV index in December - Ottawa, Canada
  • Average UV index in December: 1

The month with the highest UV index is June (UV index 8).
Months with the lowest UV index are January, November and December (UV index 1).

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