December weather forecast
Calgary, Canada

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The magnificent skyscrapers of the city of Calgary, Canada
The magnificent skyscrapers of the city of Calgary, Canada

Weather in December

Finally arriving in December, Calgary succumbs to the full force of winter, with temperatures plunging to -4.8°C (23.4°F). The city becomes a snowy landscape, with 78mm (3.07") of fresh snowfall covering the ground. Short daylight hours and long nights take center stage, creating a perfect atmosphere for holiday decorations. December, in its full glory, offers residents a picturesque white Christmas right out of storybooks.

Temperature

December, with average temperatures reaching a high of -4.8°C (23.4°F) and a low of -11.5°C (11.3°F), is the coldest month.

Humidity

In December, the average relative humidity in Calgary is 80%.

Rainfall

In Calgary, in December, during 3 rainfall days, 10mm (0.39") of precipitation is typically accumulated. Throughout the year, there are 94.1 rainfall days, and 288mm (11.34") of precipitation is accumulated.

Snowfall

Months with snowfall are January through June, September through December. In Calgary, in December, snow falls for 12.2 days, with typically accumulated 78mm (3.07") of snow. Throughout the year, there are 75.3 snowfall days, and 629mm (24.76") of snow is accumulated.

Daylight

With an average of 8h and 0min of daylight, December has the shortest days of the year in Calgary, Canada.
On the first day of the month, sunrise is at 8:18 am and sunset at 4:32 pm. On the last day of December, in Calgary, sunrise is at 8:39 am and sunset at 4:39 pm MST.

Sunshine

With an average of 5.2h of sunshine, December has the least sunshine of the year in Calgary.

UV index

In Calgary, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: The UV index of 2 during December translates into the following guidance:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.

Frequently asked questions

What month is the coldest in Calgary?

December is the coldest month in Calgary, with an average high-temperature of -4.8°C (23.4°F) and an average low-temperature of -11.5°C (11.3°F).

How cold is it in Calgary in December?

In December, in Calgary, the average high-temperature is -4.8°C (23.4°F), and the average low-temperature is -11.5°C (11.3°F).

What is the average humidity in December in Calgary?

The average relative humidity in December in Calgary, Canada, is 80%.

How much does it rain in Calgary in December?

In Calgary, in December, it is raining for 3 days, with typically 10mm (0.39") of accumulated precipitation.

How much does it snow in Calgary in December?

In Calgary, in December, during 12.2 snowfall days, 78mm (3.07") of snow is typically accumulated.

What is the month with the shortest days in Calgary?

The month with the shortest days in Calgary, Canada, is December, with an average of 8h and 0min of daylight.

How many hours of daylight does Calgary have in December?

In Calgary, the average day length in December is 8h and 0min.

When is the sunrise / sunset in December in Calgary?

On the first day of December in Calgary, Canada, sunrise is at 8:18 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 8:39 am and sunset at 4:39 pm MST.

What is the month with the least sunshine in Calgary?

December has the least sunshine of the year in Calgary, Canada, with an average of 5.2h of sunshine.

How long on average sun shines in December in Calgary?

The average sunshine duration in December is 5.2h.

What is the UV index intensity in December in Calgary?

In December, the average daily maximum UV index in Calgary is 2. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Calgary, Canada

Average temperature in December - Calgary, Canada
  • Average high temperature in December: -4.8°C

The warmest month (with the highest average high temperature) is August (22.9°C).
The month with the lowest average high temperature is December (-4.8°C).

  • Average low temperature in December: -11.5°C

The month with the highest average low temperature is July (10°C).
The coldest month (with the lowest average low temperature) is December (-11.5°C).

Average pressure in December
Calgary, Canada

Average pressure in December - Calgary, Canada
  • Average pressure in December: 1019mbar

The month with the highest atmospheric pressure is February (1019.3mbar).
The month with the lowest atmospheric pressure is June (1010.8mbar).

Average wind speed in December
Calgary, Canada

Average wind speed in December - Calgary, Canada
  • Average wind speed in December: 12km/h

The windiest month (with the highest average wind speed) is January (13.1km/h).
The calmest month (with the lowest average wind speed) is August (10.3km/h).

Average humidity in December
Calgary, Canada

Average humidity in December - Calgary, Canada
  • Average humidity in December: 80%

The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is September (59%).

Average rainfall in December
Calgary, Canada

Average rainfall in December - Calgary, Canada
  • Average rainfall in December: 10mm

The wettest month (with the highest rainfall) is June (65mm).
The driest month (with the least rainfall) is January (9mm).

Average rainfall days in December
Calgary, Canada

Average rainfall days in December - Calgary, Canada
  • Average rainfall days in December: 3 days

The month with the highest number of rainy days is June (17 days).
The month with the least rainy days is November (2.5 days).

Average snowfall in December
Calgary, Canada

Average snowfall in December - Calgary, Canada
  • Average snowfall in December: 78mm

The month with the highest snowfall is April (102mm).
The months with the least snowfall are July and August (0mm).

Average snowfall days in December
Calgary, Canada

Average snowfall days in December - Calgary, Canada
  • Average snowfall days in December: 12.2 days

The month with the highest number of snowfall days is February (12.9 days).
The months with the least snowfall days are July and August (0 days).

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

Average daylight in December / Average sunshine in December - Calgary, Canada
  • Average daylight in December: 8h and 0min

The month with the longest days is June (Average daylight: 16h and 30min).
The month with the shortest days is December (Average daylight: 8h and 0min).

  • Average sunshine in December: 5h and 1min

The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).

Average sunshine days in December
Calgary, Canada

Average sunshine days in December - Calgary, Canada
  • Average sunshine days in December: 19.3 days

The month with the most sunshine days is October (22.1 days).
The month with the least sunshine days is June (10.7 days).

Average UV index in December
Calgary, Canada

Average UV index in December - Calgary, Canada
  • Average UV index in December: 2

The month with the highest UV index is July (UV index 5).
The month with the lowest UV index is January (UV index 1).

Average cloud cover in December
Calgary, Canada

Average cloud cover in December - Calgary, Canada
  • Average cloud cover in December: 45

The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 24).

Average visibility in December
Calgary, Canada

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

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

Calgary, Canada

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