December weather forecast
London, Canada

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Weather in December

December welcomes the cold embrace of winter once again, with a high temperature average of only 0.7°C (33.3°F). Snowflakes return to London's weather scene, covering the city in a layer of winter's blanket. The city settles into a quieter rhythm, the frenzied pace of summer and fall replaced by the slow, steady beat of winter. Houses sparkle with festive lights that contrast brightly against the night's darkness. The weather in December reflects a serene ending to the year, a time of quiet and reflection.

Temperature

December brings a drop in London's average high-temperature, falling from a frosty 6.5°C (43.7°F) in November to a wintry 0.7°C (33.3°F). A mean low-temperature of -3.8°C (25.2°F) is anticipated during the month of December, a slight step down from the daytime high.

Humidity

The average relative humidity in December is 85%.

Rainfall

In London, Canada, in December, during 8 rainfall days, 23mm (0.91") of precipitation is typically accumulated. In London, during the entire year, the rain falls for 128.1 days and collects up to 346mm (13.62") of precipitation.

Snowfall

Months with snowfall are January through May, October through December. In London, during December, snow falls for 14.4 days and regularly aggregates up to 51mm (2.01") of snow. In London, during the entire year, snow falls for 68.4 days and aggregates up to 277mm (10.91") of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 6min of daylight.
On the first day of December in London, sunrise is at 7:37 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:56 am and sunset at 5:00 pm EST.

Sunshine

The average sunshine in December is 2.7h.

UV index

January, February and December, with an average maximum UV index of 1, are months with the lowest UV index in London. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the average person.
Note: A maximum daily UV index of 1 during December morphs into the following directions:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.

Frequently asked questions

How cold is December in London?

In December, the average high-temperature and low-temperature in London, Canada, are 0.7°C (33.3°F) and -3.8°C (25.2°F) respectively.

What is the average humidity in December in London?

In London, Canada, the average relative humidity in December is 85%.

How many days does it rain in December in London?

In London, Canada, in December, during 8 rainfall days, 23mm (0.91") of precipitation is typically accumulated.

How much does it snow in London in December?

In London, Canada, in December, during 14.4 snowfall days, 51mm (2.01") of snow is typically accumulated.

What is the month with the shortest days in London?

The month with the shortest days in London, Canada, is December, with an average of 9h and 6min of daylight.

How many hours of daylight does London have in December?

The average day length in December in London, Canada, is 9h and 4min.

What time are sunrise and sunset in December in London?

On the first day of December in London, sunrise is at 7:37 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:56 am and sunset at 5:00 pm EST.

How many hours of sunshine does London have in December?

In London, the average sunshine duration in December is 2.7h.

When is the lowest UV index in London?

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

How high is the UV index in December in London?

In December, the average daily maximum UV index in London, Canada, is 1. A UV Index estimate of 2, and below, represents a low health threat from 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
London, Canada

Average temperature in December - London, Canada
  • Average high temperature in December: 0.7°C

The warmest month (with the highest average high temperature) is July (25.5°C).
The month with the lowest average high temperature is January (-2.8°C).

  • Average low temperature in December: -3.8°C

The month with the highest average low temperature is July (15.4°C).
The coldest months (with the lowest average low temperature) are January and February (-8.2°C).

Average pressure in December
London, Canada

Average pressure in December - London, Canada
  • Average pressure in December: 1017.8mbar

The month with the highest atmospheric pressure is March (1018.7mbar).
The month with the lowest atmospheric pressure is June (1013.4mbar).

Average wind speed in December
London, Canada

Average wind speed in December - London, Canada
  • Average wind speed in December: 17.1km/h

The windiest month (with the highest average wind speed) is January (17.9km/h).
The calmest month (with the lowest average wind speed) is July (10.4km/h).

Average humidity in December
London, Canada

Average humidity in December - London, Canada
  • Average humidity in December: 85%

The months with the highest relative humidity are January and February (88%).
The months with the lowest relative humidity are April and May (75%).

Average rainfall in December
London, Canada

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

The wettest month (with the highest rainfall) is July (45mm).
The driest month (with the least rainfall) is March (20mm).

Average rainfall days in December
London, Canada

Average rainfall days in December - London, Canada
  • Average rainfall days in December: 8 days

The month with the highest number of rainy days is May (14.1 days).
The months with the least rainy days are January and February (5.7 days).

Average snowfall in December
London, Canada

Average snowfall in December - London, Canada
  • Average snowfall in December: 51mm

The month with the highest snowfall is January (71mm).
The months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in December
London, Canada

Average snowfall days in December - London, Canada
  • Average snowfall days in December: 14.4 days

The month with the highest number of snowfall days is January (17.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - London, Canada
  • Average daylight in December: 9h and 1min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in December: 2h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).

Average sunshine days in December
London, Canada

Average sunshine days in December - London, Canada
  • Average sunshine days in December: 10.6 days

The month with the most sunshine days is September (16.1 days).
The month with the least sunshine days is January (9.3 days).

Average UV index in December
London, Canada

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

The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).

Average cloud cover in December
London, Canada

Average cloud cover in December - London, Canada
  • Average cloud cover in December: 72

The month with the most cloud cover is January (Cloud cover 76).
The month with the least cloud cover is July (Cloud cover 33).

Average visibility in December
London, Canada

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

The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January and February (8km).

London, Canada

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