Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average sea temperature in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
In Holyhead, December's average high-temperature stands at a chilly 9.5°C (49.1°F), closely related to the preceding month. Holyhead's average nighttime temperature in December modestly descends to 7.5°C (45.5°F).Humidity
The average relative humidity in December in Holyhead is 80%.Rainfall
In Holyhead, in December, during 22.8 rainfall days, 80mm (3.15") of precipitation is typically accumulated. Throughout the year, in Holyhead, there are 233.6 rainfall days, and 739mm (29.09") of precipitation is accumulated.Snowfall
Months with snowfall are January through March, November and December. The months with the most snowfall are January and December, with an average 4mm (0.16") of accumulated snow.Sea temperature
In Holyhead, in December, the average water temperature is 10.9°C (51.6°F).Note: Swimming in 10.9°C (51.6°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.
Daylight
With an average of 7h and 36min of daylight, December has the shortest days of the year in Holyhead, United Kingdom.On the first day of the month, sunrise is at 8:11 am and sunset at 4:04 pm. On the last day of December, in Holyhead, United Kingdom, sunrise is at 8:33 am and sunset at 4:10 pm GMT.
Sunshine
With an average of 3.6h of sunshine, December has the least sunshine of the year in Holyhead.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Holyhead, United Kingdom. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum UV index, 2 during December, leads to the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. Minimize direct exposure to the Sun during midday when its radiation is at its peak. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Frequently asked questions
What are the temperatures in Holyhead in December?
What is the average humidity in December in Holyhead?
How much does it rain in Holyhead in December?
What is the snowiest month in Holyhead?
How many days does it snow in December in Holyhead?
How cold is the water in December in Holyhead?
What is the month with the shortest days in Holyhead?
How many hours of daylight does Holyhead have in December?
What time are sunrise and sunset in December in Holyhead?
What is the month with the least sunshine in Holyhead?
How many hours of sunshine does Holyhead have in December?
When is the lowest UV index in Holyhead?
What is the UV index intensity in December in Holyhead?
Average temperature in December
Holyhead, United Kingdom
- Average high temperature in December: 9.5°C
The warmest month (with the highest average high temperature) is August (16.6°C).
The month with the lowest average high temperature is February (7.8°C).
- Average low temperature in December: 7.5°C
The month with the highest average low temperature is August (14.3°C).
The coldest month (with the lowest average low temperature) is February (5.8°C).
Average pressure in December
Holyhead, United Kingdom
- Average pressure in December: 1011.7mbar
The month with the highest atmospheric pressure is May (1016.1mbar).
The month with the lowest atmospheric pressure is November (1008.7mbar).
Average wind speed in December
Holyhead, United Kingdom
- Average wind speed in December: 31.3km/h
The windiest month (with the highest average wind speed) is December (31.3km/h).
The calmest month (with the lowest average wind speed) is June (18.7km/h).
Average humidity in December
Holyhead, United Kingdom
- Average humidity in December: 80%
The months with the highest relative humidity are July and August (84%).
The month with the lowest relative humidity is November (79%).
Average rainfall in December
Holyhead, United Kingdom
- Average rainfall in December: 80mm
The wettest month (with the highest rainfall) is November (87mm).
The driest month (with the least rainfall) is May (36mm).
Average rainfall days in December
Holyhead, United Kingdom
- Average rainfall days in December: 22.8 days
The month with the highest number of rainy days is August (23.4 days).
The month with the least rainy days is April (15.6 days).
Average snowfall in December
Holyhead, United Kingdom
- Average snowfall in December: 4mm
The months with the highest snowfall are January and December (4mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in December
Holyhead, United Kingdom
- Average snowfall days in December: 0.9 days
The month with the highest number of snowfall days is January (1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature in December
Holyhead, United Kingdom
- Average sea temperature in December: 10.9°C
The best month for swimming (with the highest average sea temperature) is September (15.2°C).
The coldest month (with the lowest average sea temperature) is March (8.3°C).
Average daylight in December /
Average sunshine in December
Holyhead, United Kingdom
- Average daylight in December: 7h and 4min
The month with the longest days is June (Average daylight: 16h and 54min).
The month with the shortest days is December (Average daylight: 7h and 36min).
- Average sunshine in December: 3h and 4min
The month with the most sunshine is May (Average sunshine: 8h and 30min).
The month with the least sunshine is December (Average sunshine: 3h and 36min).
Average sunshine days in December
Holyhead, United Kingdom
- Average sunshine days in December: 4.3 days
The month with the most sunshine days is May (12.3 days).
The month with the least sunshine days is December (4.3 days).
Average UV index in December
Holyhead, 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 and December (UV index 2).
Average cloud cover in December
Holyhead, United Kingdom
- Average cloud cover in December: 65
The month with the most cloud cover is December (Cloud cover 65).
The month with the least cloud cover is May (Cloud cover 46).
Average visibility in December
Holyhead, United Kingdom
- Average visibility in December: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
Holyhead, United Kingdom
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