December weather forecast
Altarnun, United Kingdom

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Weather in December

The first month of the winter, December, is also a frosty month in Altarnun, United Kingdom, with an average temperature fluctuating between 5.7°C (42.3°F) and 9°C (48.2°F).

Temperature

In Altarnun, December's average high-temperature stands at a chilly 9°C (48.2°F), closely related to the preceding month. December registers an average low temperature of 5.7°C (42.3°F), subtly lower than the daytime maximum.

Humidity

January, June through December, with an average relative humidity of 86%, are the most humid months in Altarnun, United Kingdom.

Rainfall

December is the month with the most rainfall. Rain falls for 20.2 days and accumulates 87mm (3.43") of precipitation.

Snowfall

Months with snowfall in Altarnun are January through April and December. December is the first month it typically snows in Altarnun. Throughout December, in the average 0.5 snowfall days, it receives 4mm (0.16") of snow. Throughout the year, in Altarnun, there are 4.3 snowfall days, and 45mm (1.77") of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 8h and 6min of daylight.
On the first day of the month, sunrise is at 7:58 am and sunset at 4:16 pm. On the last day of December, sunrise is at 8:19 am and sunset at 4:23 pm GMT.

Sunshine

The months with the least sunshine are January, November and December, with an average of 3.6h of sunshine.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Altarnun. A UV Index value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
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Frequently asked questions

What are the temperatures in Altarnun in December?

The high-temperature, in December, in Altarnun, is 9°C (48.2°F), while the low-temperature averages to 5.7°C (42.3°F).

What are the most humid months in Altarnun?

January, June through December, with an average relative humidity of 86%, are most humid months in Altarnun, United Kingdom.

What is the average humidity in December in Altarnun?

In December, the average relative humidity is 86%.

What is the rainiest month in Altarnun?

The month with the most rainfall in Altarnun, United Kingdom, is December, when the rain falls for 20.2 days and typically aggregates up to 87mm (3.43") of precipitation.

How much does it rain in Altarnun in December?

In December, in Altarnun, United Kingdom, the rain falls for 20.2 days. Throughout December, 87mm (3.43") of precipitation is accumulated.

When does it start snowing in Altarnun?

December is the first month it typically snows in Altarnun. Throughout December, in the average 0.5 snowfall days, it receives 4mm (0.16") of snow.

What is the month with the shortest days in Altarnun?

The month with the shortest days is December, with an average of 8h and 6min of daylight.

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

In December, the average day length is 8h and 4min.

When is the sunrise / sunset in December in Altarnun?

In December, on the first day of the month, sunrise is at 7:58 am and sunset at 4:16 pm. On the last day of the month, in Altarnun, sunrise is at 8:19 am and sunset at 4:23 pm GMT.

What is the month with the least sunshine in Altarnun?

The months with the least sunshine are January, November and December, with an average of 3.6h of sunshine.

How long on average sun shines in December in Altarnun?

In Altarnun, the average sunshine duration in December is 3.6h.

What are the months with the lowest UV index in Altarnun?

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

What is the UV index intensity in December in Altarnun?

In December, the average daily maximum UV index in Altarnun is 2. A UV Index value of 2, and less, symbolizes a low health threat 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
Altarnun, United Kingdom

Average temperature in December - Altarnun, United Kingdom
  • Average high temperature in December: 9°C

The warmest month (with the highest average high temperature) is July (18.7°C).
The months with the lowest average high temperature are January and February (8.1°C).

  • Average low temperature in December: 5.7°C

The month with the highest average low temperature is August (12.6°C).
The coldest month (with the lowest average low temperature) is February (3.9°C).

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Average pressure in December
Altarnun, United Kingdom

Average pressure in December - Altarnun, United Kingdom
  • Average pressure in December: 1014.7mbar

The month with the highest atmospheric pressure is September (1017.3mbar).
The month with the lowest atmospheric pressure is November (1010.2mbar).

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Average wind speed in December
Altarnun, United Kingdom

Average wind speed in December - Altarnun, United Kingdom
  • Average wind speed in December: 23.1km/h

The windiest month (with the highest average wind speed) is December (23.1km/h).
The calmest month (with the lowest average wind speed) is July (15.1km/h).

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Average humidity in December
Altarnun, United Kingdom

Average humidity in December - Altarnun, United Kingdom
  • Average humidity in December: 86%

The months with the highest relative humidity are January, June, July, August, September, October, November and December (86%).
The month with the lowest relative humidity is April (83%).

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Average rainfall in December
Altarnun, United Kingdom

Average rainfall in December - Altarnun, United Kingdom
  • Average rainfall in December: 87mm

The wettest month (with the highest rainfall) is December (87mm).
The driest month (with the least rainfall) is May (32mm).

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Average rainfall days in December
Altarnun, United Kingdom

Average rainfall days in December - Altarnun, United Kingdom
  • Average rainfall days in December: 20.2 days

The month with the highest number of rainy days is December (20.2 days).
The month with the least rainy days is September (15.1 days).

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Average snowfall in December
Altarnun, United Kingdom

Average snowfall in December - Altarnun, United Kingdom
  • Average snowfall in December: 4mm

The month with the highest snowfall is January (24mm).
The months with the least snowfall are May, June, July, August, September, October and November (0mm).

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Average snowfall days in December
Altarnun, United Kingdom

Average snowfall days in December - Altarnun, United Kingdom
  • Average snowfall days in December: 0.5 days

The month with the highest number of snowfall days is January (1.7 days).
The months with the least snowfall days are May, June, July, August, September, October and November (0 days).

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

Average daylight in December / Average sunshine in December - Altarnun, United Kingdom
  • Average daylight in December: 8h and 1min

The month with the longest days is June (Average daylight: 16h and 24min).
The month with the shortest days is December (Average daylight: 8h and 6min).

  • Average sunshine in December: 3h and 4min

The month with the most sunshine is April (Average sunshine: 7h and 30min).
The months with the least sunshine are January, November and December (Average sunshine: 3h and 36min).

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Average sunshine days in December
Altarnun, United Kingdom

Average sunshine days in December - Altarnun, United Kingdom
  • Average sunshine days in December: 8.5 days

The month with the most sunshine days is May (11.8 days).
The month with the least sunshine days is November (7.6 days).

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Average UV index in December
Altarnun, United Kingdom

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

The months with the highest UV index are May, June, July, August and September (UV index 4).
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
Altarnun, United Kingdom

Average cloud cover in December - Altarnun, United Kingdom
  • Average cloud cover in December: 65

The months with the most cloud cover are November and December (Cloud cover 65).
The month with the least cloud cover is April (Cloud cover 50).

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Average visibility in December
Altarnun, United Kingdom

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

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

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Altarnun, United Kingdom

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