December weather forecast and climate
Toronto, Canada

Colorfully lit night city of Toronto, Canada, with a view of the Nathan Phillips Square, and a large Toronto sign
Colorfully lit night city of Toronto, Canada, with a view of the Nathan Phillips Square, and a large Toronto sign
December is the driest month in Toronto, with approximately eleven days of rainfall and very low precipitation of 20.3mm (0.8") on average.
Winter weather becomes alive as the temperature falls into the range of -3°C (26.6°F) and 1°C (33.8°F). The blizzard is more intense and has higher gusts making most days and nights icy and frigid.
There are approximately nine snowfall days in December with a fairly high accumulation of 241.3mm (9.5") of snow. This factor reduces most activities indoors except for skating and skiing for the fans of the cold.
It remains vital to dress warmly, whether indoors or outdoors, as the temperatures keep dropping as weeks go by. Occasionally, the weather lifts slightly but falls back to freeze city of Toronto.

What is the temperature in December in Toronto?

The average high-temperature, in December, in Toronto, is 2.1°C (35.8°F), while the average low-temperature is -3.1°C (26.4°F).
Average temperature in December - Toronto, Canada
  • Average high temperature in December: 2.1°C

The warmest month (with the highest average high temperature) is July (26.6°C).
The month with the lowest average high temperature is January (-0.7°C).

  • Average low temperature in December: -3.1°C

The month with the highest average low temperature is July (18°C).
The coldest month (with the lowest average low temperature) is January (-6.7°C).

Average rainfall in December - Toronto, Canada
  • Average rainfall in December: 38.2mm

The wettest month (with the highest rainfall) is September (84.7mm).
The driest month (with the lowest rainfall) is January (29.1mm).

Average rainfall days in December - Toronto, Canada
  • Average rainfall days in December: 7 days

The month with the highest number of rainy days is May (12.7 days).
The month with the lowest number of rainy days is February (4.8 days).

Average snowfall in December - Toronto, Canada
  • Average snowfall in December: 241mm

The month with the highest snowfall is January (372mm).
Months with the lowest snowfall are May, June, July, August and September (0mm).

Average snowfall days in December - Toronto, Canada
  • Average snowfall days in December: 8.4 days

The month with the highest number of snowfall days is January (12 days).
Months with the lowest number of snowfall days are May, June, July, August and September (0 days).

Average sea temperature in December - Toronto, Canada
  • Average sea temperature in December: 5°C

The best month for swimming (with the highest average sea temperature) is August (22.3°C).
The coldest month (with the lowest average sea temperature) is March (1.9°C).

Average daylight in December / Average sunshine in December - Toronto, Canada
  • Average daylight in December: 9h

The month with the longest days is June (Average daylight: 15.4h).
The month with shortest days is December (Average daylight: 9h).

  • Average sunshine in December: 2.5h

The month with most sunshine is July (Average sunshine: 9h).
The month with least sunshine is December (Average sunshine: 2.5h).

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

Months with the highest UV index are June and July (UV index 8).
Months with the lowest UV index are January and December (UV index 1).

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