December weather forecast
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

Weather in December

December, the first month of the winter, in Toronto, is also a wintry month, with temperature in the range of an average low of -2.5°C (27.5°F) and an average high of 1.4°C (34.5°F).

Temperature

In Toronto, the average high-temperature decreases, from a chilly 7.1°C (44.8°F) in November, to a wintry 1.4°C (34.5°F). In Toronto, in December, the average low-temperature is -2.5°C (27.5°F).

Humidity

In Toronto, the average relative humidity is 81%.

Rainfall

In Toronto, Canada,, during 7.7 rainfall days, 23mm (0.91") of precipitation is typically accumulated. In Toronto, during the entire year, the rain falls for 136.8 days and collects up to 420mm (16.54") of precipitation.

Snowfall

January through April, November and December are months with snowfall in Toronto. In December, it is snowing for 9.9 days. Throughout December, 41mm (1.61") of snow is accumulated. In Toronto, during the entire year, snow falls for 45.6 days, and aggregates up to 223mm (8.78") of snow.

Sea temperature

In December, the average sea temperature is 5°C (41°F).
Note: At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.

Daylight

The month with the shortest days in Toronto, Canada, is December, with an average of 9h of daylight.

Sunshine

The average sunshine in Toronto is 3.6h.

UV index

January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low threat to health from unsafe exposure to the UV radiation for the ordinary person.
Note: In December, the average maximum UV index of 1 translate into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in December in Toronto?

In December, the average relative humidity in Toronto, Canada, is 81%.

How much does it rain in Toronto in December?

In Toronto, Canada, in December, it is raining for 7.7 days, with typically 23mm (0.91") of accumulated precipitation.

How much does it snow in Toronto in December?

In Toronto, in December, snow falls for 9.9 days, with typically accumulated 41mm (1.61") of snow.

What is the sea water temperature in December in Toronto?

In December, the average sea temperature is 5°C (41°F). At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.

What is the month with the shortest days in Toronto?

With an average of 9h of daylight, December has the shortest days of the year.

What is the average length of the day in December in Toronto?

The average length of the day in December in Toronto, Canada, is 9h.

How long on average sun shines in December in Toronto?

In December, the average sunshine is 3.6h.

What is the month with the lowest UV index in Toronto?

January and December, with an average maximum UV index of 1, are months with the lowest UV index in Toronto.

What is the UV index intensity in December in Toronto?

In Toronto, Canada, the average daily maximum UV index in December is 1. A UV Index value of 2, and less, symbolizes a low health threat from the exposure to the Sun's UV rays.

Average temperature in December
Toronto, Canada

Average temperature in December - Toronto, Canada
  • Average high temperature in December: 1.4°C

The warmest month (with the highest average high temperature) is July (24.8°C).
The month with the lowest average high temperature is January (-2.3°C).

  • Average low temperature in December: -2.5°C

Months with the highest average low temperature are July and August (18.4°C).
The coldest month (with the lowest average low temperature) is January (-7°C).

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Average pressure in December
Toronto, Canada

Average pressure in December - Toronto, Canada
  • Average pressure in December: 1017.4mbar

The month with the highest atmospheric pressure is March (1018.4mbar).
The month with the lowest atmospheric pressure is June (1013.1mbar).

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Average wind speed in December
Toronto, Canada

Average wind speed in December - Toronto, Canada
  • Average wind speed in December: 18.8km/h

The windiest month (with the highest average wind speed) is January (19.5km/h).
The calmest month (with the lowest average wind speed) is July (11.7km/h).

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Average humidity in December
Toronto, Canada

Average humidity in December - Toronto, Canada
  • Average humidity in December: 81%

Months with the highest relative humidity are January and February (83%).
Months with the lowest relative humidity are August and September (74%).

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Average rainfall in December
Toronto, Canada

Average rainfall in December - Toronto, Canada
  • Average rainfall in December: 23mm

The wettest month (with the highest rainfall) is July (53mm).
The driest month (with the least rainfall) is February (19mm).

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Average rainfall days in December
Toronto, Canada

Average rainfall days in December - Toronto, Canada
  • Average rainfall days in December: 7.7 days

The month with the highest number of rainy days is July (15.9 days).
The month with the least rainy days is February (5.6 days).

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Average snowfall in December
Toronto, Canada

Average snowfall in December - Toronto, Canada
  • Average snowfall in December: 41mm

The month with the highest snowfall is January (57mm).
Months with the least snowfall are May, June, July, August, September and October (0mm).

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Average snowfall days in December
Toronto, Canada

Average snowfall days in December - Toronto, Canada
  • Average snowfall days in December: 9.9 days

The month with the highest number of snowfall days is January (11.9 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average sea temperature in December
Toronto, Canada

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).

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Average daylight in December /
Average sunshine in December
Toronto, Canada

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 the shortest days is December (Average daylight: 9h).

  • Average sunshine in December: 3.6h

The month with the most sunshine is July (Average sunshine: 10.8h).
The month with the least sunshine is January (Average sunshine: 3.2h).

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Average sunshine days in December
Toronto, Canada

Average sunshine days in December - Toronto, Canada
  • Average sunshine days in December: 14.3 days

The month with the most sunshine days is March (16.2 days).
The month with the least sunshine days is July (12.8 days).

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Average UV index in December
Toronto, Canada

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

Months with the highest UV index are July and August (UV index 6).
Months with the lowest UV index are January and December (UV index 1).

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Average cloud cover in December
Toronto, Canada

Average cloud cover in December - Toronto, Canada
  • Average cloud cover in December: 63

The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 26).

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Average visibility in December
Toronto, Canada

Average visibility in December - Toronto, Canada
  • Average visibility in December: 9km

Months with the highest visibility are June, July, August, September and October (10km).
Months with the lowest visibility are January, February, March, April, May, November and December (9km).

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