December weather forecast
London, United Kingdom

The large Thames river overlooking the Westminster Palace and the Big Ben clock tower in London, United Kingdom
The large Thames river overlooking the Westminster Palace and the Big Ben clock tower in London, United Kingdom

Weather in December

December, the first month of the winter in London, is also a frosty month, with an average temperature ranging between min 3.5°C (38.3°F) and max 7.8°C (46°F).

Temperature

In December, the average high-temperature is practically the same as in November - a chilly 7.8°C (46°F). The average low-temperature, in December, is 3.5°C (38.3°F).

Humidity

With an average relative humidity of 88%, December is the most humid month in London.

Rainfall

In December, in London, the rain falls for 11.1 days. Throughout December, 37mm (1.46") of precipitation is accumulated. Throughout the year, in London, United Kingdom, there are 151.7 rainfall days, and 370mm (14.57") of precipitation is accumulated.

Snowfall

Months with snowfall in London are January through April, November and December. In London, during December, snow falls for 1.2 days and regularly aggregates up to 9mm (0.35") of snow. Throughout the year, in London, United Kingdom, there are 7.7 snowfall days, and 50mm (1.97") of snow is accumulated.

Daylight

With an average of 7h and 56min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:43 am and sunset at 3:55 pm. On the last day of December, in London, sunrise is at 8:06 am and sunset at 4:00 pm GMT.

Sunshine

In London, the average sunshine in December is 4.2h.

UV index

The months with the lowest UV index in London are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for the 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in December in London?

In London, in December, the average high-temperature is 7.8°C (46°F), and the average low-temperature is 3.5°C (38.3°F).

What is the most humid month in London?

The most humid month in London, United Kingdom, is December, with an average relative humidity of 88%.

What is the average humidity in December in London?

In London, United Kingdom, the average relative humidity in December is 88%.

How many days does it rain in December in London?

In London, United Kingdom, in December, it is raining for 11.1 days, with typically 37mm (1.46") of accumulated precipitation.

How much does it snow in London in December?

In London, United Kingdom, during December, snow falls for 1.2 days and regularly aggregates up to 9mm (0.35") of snow.

What is the month with the shortest days in London?

December has the shortest days of the year, with an average of 7h and 56min of daylight.

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

In December, the average day length in London is 7h and 56min.

When is the sunrise / sunset in December in London?

On the first day of December in London, United Kingdom, sunrise is at 7:43 am and sunset at 3:55 pm. On the last day of the month, sunrise is at 8:06 am and sunset at 4:00 pm GMT.

How many hours of sunshine does London have in December?

In London, the average sunshine duration in December is 4.2h.

When is the lowest UV index in London?

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.

How high is the UV index in December in London?

In London, United Kingdom, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health 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
London, United Kingdom

Average temperature in December - London, United Kingdom
  • Average high temperature in December: 7.8°C

The warmest month (with the highest average high temperature) is July (22.3°C).
The month with the lowest average high temperature is January (6.8°C).

  • Average low temperature in December: 3.5°C

The month with the highest average low temperature is August (13.8°C).
The coldest month (with the lowest average low temperature) is January (2.2°C).

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Average pressure in December
London, United Kingdom

Average pressure in December - London, United Kingdom
  • Average pressure in December: 1014.5mbar

The month with the highest atmospheric pressure is September (1016.9mbar).
The month with the lowest atmospheric pressure is November (1010.6mbar).

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Average wind speed in December
London, United Kingdom

Average wind speed in December - London, United Kingdom
  • Average wind speed in December: 17km/h

The windiest month (with the highest average wind speed) is February (17.3km/h).
The calmest month (with the lowest average wind speed) is September (12.6km/h).

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Average humidity in December
London, United Kingdom

Average humidity in December - London, United Kingdom
  • Average humidity in December: 88%

The month with the highest relative humidity is December (88%).
The month with the lowest relative humidity is August (72%).

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Average rainfall in December
London, United Kingdom

Average rainfall in December - London, United Kingdom
  • Average rainfall in December: 37mm

The wettest month (with the highest rainfall) is June (45mm).
The driest month (with the least rainfall) is April (22mm).

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Average rainfall days in December
London, United Kingdom

Average rainfall days in December - London, United Kingdom
  • Average rainfall days in December: 11.1 days

The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is September (9.8 days).

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Average snowfall in December
London, United Kingdom

Average snowfall in December - London, United Kingdom
  • Average snowfall in December: 9mm

The month with the highest snowfall is February (16mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).

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Average snowfall days in December
London, United Kingdom

Average snowfall days in December - London, United Kingdom
  • Average snowfall days in December: 1.2 days

The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in December /
Average sunshine in December
London, United Kingdom

Average daylight in December / Average sunshine in December - London, United Kingdom
  • Average daylight in December: 7h and 56min

The month with the longest days is June (Average daylight: 16h and 34min).
The month with the shortest days is December (Average daylight: 7h and 56min).

  • Average sunshine in December: 4h and 12min

The month with the most sunshine is August (Average sunshine: 7h and 54min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).

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Average sunshine days in December
London, United Kingdom

Average sunshine days in December - London, United Kingdom
  • Average sunshine days in December: 17.5 days

The month with the most sunshine days is September (18.1 days).
The month with the least sunshine days is June (12.2 days).

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Average UV index in December
London, United Kingdom

Average UV index in December - London, United Kingdom
  • Average UV index in December: 2

The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in December
London, United Kingdom

Average cloud cover in December - London, United Kingdom
  • Average cloud cover in December: 58

The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is September (Cloud cover 49).

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Average visibility in December
London, United Kingdom

Average visibility in December - London, United Kingdom
  • Average visibility in December: 9km

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

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