December weather forecast and climate
Glastonbury, United Kingdom

Weather in December

The first month of the winter, December, is still a chilly month in Glastonbury, United Kingdom, with average temperature ranging between max 8.1°C (46.6°F) and min 4.1°C (39.4°F).

Temperature

In December, the average high-temperature is relatively the same as in November - a frosty 8.1°C (46.6°F). In Glastonbury, the average low-temperature is 4.1°C (39.4°F).

Humidity

Months with the highest humidity in Glastonbury are January, November and December, with an average relative humidity of 89%.

Rainfall

December is the month with the most rainfall in Glastonbury. Rain falls for 15.4 days and accumulates 67mm (2.64") of precipitation.

Snowfall

Months with snowfall in Glastonbury, United Kingdom, are January through March, November and December. In Glastonbury, United Kingdom, during December, snow falls for 0.8 days and regularly aggregates up to 5mm (0.2") of snow. Throughout the year, there are 8.2 snowfall days, and 53mm (2.09") of snow is accumulated.

Daylight

The month with the shortest days in Glastonbury is December, with an average of 8h of daylight.

Sunshine

The average sunshine in Glastonbury is 4h.

UV index

Months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from the exposure to the Sun's UV radiation 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in December in Glastonbury?

The average high-temperature, in December, is 8.1°C (46.6°F), while the average low-temperature is 4.1°C (39.4°F).

What are the most humid months in Glastonbury?

January, November and December, with an average relative humidity of 89%, are most humid months.

What is the average humidity in December in Glastonbury?

In Glastonbury, United Kingdom, the average relative humidity in December is 89%.

How many days does it rain in December in Glastonbury?

In December, the rain falls for 15.4 days. Throughout December, 67mm (2.64") of precipitation is accumulated.

What is the wettest month in Glastonbury?

December is the month with the most rainfall in Glastonbury, United Kingdom. Rain falls for 15.4 days and accumulates 67mm (2.64") of precipitation.

How many days does it snow in December in Glastonbury?

In December, it is snowing for 0.8 days. Throughout December, 5mm (0.2") of snow is accumulated.

What is the month with the shortest days in Glastonbury?

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

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

In Glastonbury, United Kingdom, the average length of the day in December is 8h.

How many hours of sunshine does Glastonbury have in December?

The average sunshine in December in Glastonbury is 4h.

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

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 Glastonbury?

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

Average temperature in December
Glastonbury, United Kingdom

Average temperature in December - Glastonbury, United Kingdom
  • Average high temperature in December: 8.1°C

The warmest month (with the highest average high temperature) is July (19.9°C).
The month with the lowest average high temperature is January (7.2°C).

  • Average low temperature in December: 4.1°C

The month with the highest average low temperature is August (12.3°C).
The coldest month (with the lowest average low temperature) is February (2.5°C).

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Average pressure in December
Glastonbury, United Kingdom

Average pressure in December - Glastonbury, United Kingdom
  • Average pressure in December: 1014.4mbar

The month with the highest atmospheric pressure is September (1016.9mbar).
The month with the lowest atmospheric pressure is November (1010.2mbar).

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Average wind speed in December
Glastonbury, United Kingdom

Average wind speed in December - Glastonbury, United Kingdom
  • Average wind speed in December: 17.6km/h

The windiest month (with the highest average wind speed) is February (18.3km/h).
The calmest month (with the lowest average wind speed) is July (12.9km/h).

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Average humidity in December
Glastonbury, United Kingdom

Average humidity in December - Glastonbury, United Kingdom
  • Average humidity in December: 89%

Months with the highest relative humidity are January, November and December (89%).
The month with the lowest relative humidity is July (82%).

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Average rainfall in December
Glastonbury, United Kingdom

Average rainfall in December - Glastonbury, United Kingdom
  • Average rainfall in December: 67mm

The wettest month (with the highest rainfall) is December (67mm).
The driest months (with the least rainfall) are April and September (30mm).

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Average rainfall days in December
Glastonbury, United Kingdom

Average rainfall days in December - Glastonbury, United Kingdom
  • Average rainfall days in December: 15.4 days

The month with the highest number of rainy days is November (16.5 days).
The month with the least rainy days is February (12.4 days).

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Average snowfall in December
Glastonbury, United Kingdom

Average snowfall in December - Glastonbury, United Kingdom
  • Average snowfall in December: 5mm

The month with the highest snowfall is January (25mm).
Months with the least snowfall are April, May, June, July, August, September and October (0mm).

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Average snowfall days in December
Glastonbury, United Kingdom

Average snowfall days in December - Glastonbury, United Kingdom
  • Average snowfall days in December: 0.8 days

Months with the highest number of snowfall days are January and February (2.7 days).
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
Glastonbury, United Kingdom

Average daylight in December / Average sunshine in December - Glastonbury, United Kingdom
  • Average daylight in December: 8h

The month with the longest days is June (Average daylight: 16.5h).
The month with the shortest days is December (Average daylight: 8h).

  • Average sunshine in December: 4h

The month with the most sunshine is July (Average sunshine: 8h).
The month with the least sunshine is November (Average sunshine: 3.8h).

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Average sunshine days in December
Glastonbury, United Kingdom

Average sunshine days in December - Glastonbury, United Kingdom
  • Average sunshine days in December: 12.8 days

The month with the most sunshine days is September (15.3 days).
The month with the least sunshine days is November (10.4 days).

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Average UV index in December
Glastonbury, United Kingdom

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

Months with the highest UV index are May, June, July, August and September (UV index 4).
Months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in December
Glastonbury, United Kingdom

Average cloud cover in December - Glastonbury, United Kingdom
  • Average cloud cover in December: 60

The month with the most cloud cover is November (Cloud cover 62).
The month with the least cloud cover is May (Cloud cover 50).

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Average visibility in December
Glastonbury, United Kingdom

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

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

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