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
Portrush marks the arrival of December with an average high-temperature of a still chilly 7.5°C (45.5°F), hardly different from November's 9.3°C (48.7°F). December nighttime temperatures in Portrush hover close to the daytime peak with an average of 4.7°C (40.5°F).Humidity
In December, the average relative humidity is 84%.Rainfall
In Portrush, during December, the rain falls for 20.9 days and regularly aggregates up to 51mm (2.01") of precipitation. Throughout the year, in Portrush, there are 238.3 rainfall days, and 632mm (24.88") of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. In Portrush, in December, snow falls for 1.4 days, with typically accumulated 7mm (0.28") of snow. In Portrush, during the entire year, snow falls for 8 days and aggregates up to 47mm (1.85") of snow.Sea temperature
In Portrush, in December, the average water temperature is 10.6°C (51.1°F).Note: With the appropriate swimsuit, one can swim in 10.6°C (51.1°F) even if temperatures dip below 10°C (50°F); otherwise, be ready for cold shock and breath issues. A fleeting swim around 13°C (55.4°F) is distressing.
Daylight
With an average of 7h and 12min of daylight, December has the shortest days of the year in Portrush.On the first day of the month, sunrise is at 8:29 am and sunset at 4:02 pm. On the last day of December, in Portrush, sunrise is at 8:52 am and sunset at 4:07 pm GMT.
Sunshine
The average sunshine in December is 4h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The average daily UV index of 2 in December transforms into the following instructions:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. During bright days, sunglasses that offer UVA and UVB defense are recommended. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What is the average December temperature in Portrush?
What is the average humidity in December in Portrush?
How many days does it rain in December in Portrush?
How much does it snow in Portrush in December?
What is the sea water temperature in December in Portrush?
What is the month with the shortest days in Portrush?
What is the average length of the day in December in Portrush?
When are sunrise and sunset in December in Portrush?
How many hours of sunshine does Portrush have in December?
What are the months with the lowest UV index in Portrush?
What is the UV index intensity in December in Portrush?
Average temperature in December
Portrush, United Kingdom
- Average high temperature in December: 7.5°C
The warmest month (with the highest average high temperature) is July (16°C).
The month with the lowest average high temperature is January (7.1°C).
- Average low temperature in December: 4.7°C
The month with the highest average low temperature is August (11.8°C).
The coldest month (with the lowest average low temperature) is February (4°C).
Average pressure in December
Portrush, United Kingdom
- Average pressure in December: 1008.2mbar
The month with the highest atmospheric pressure is May (1015.2mbar).
The month with the lowest atmospheric pressure is November (1006.6mbar).
Average wind speed in December
Portrush, United Kingdom
- Average wind speed in December: 27km/h
The windiest month (with the highest average wind speed) is January (27.5km/h).
The calmest month (with the lowest average wind speed) is July (16.7km/h).
Average humidity in December
Portrush, United Kingdom
- Average humidity in December: 84%
The months with the highest relative humidity are July and August (86%).
The month with the lowest relative humidity is April (81%).
Average rainfall in December
Portrush, United Kingdom
- Average rainfall in December: 51mm
The wettest months (with the highest rainfall) are July and August (74mm).
The driest month (with the least rainfall) is April (35mm).
Average rainfall days in December
Portrush, United Kingdom
- Average rainfall days in December: 20.9 days
The month with the highest number of rainy days is August (24 days).
The month with the least rainy days is April (16.8 days).
Average snowfall in December
Portrush, United Kingdom
- Average snowfall in December: 7mm
The month with the highest snowfall is February (16mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in December
Portrush, United Kingdom
- Average snowfall days in December: 1.4 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).
Average sea temperature in December
Portrush, United Kingdom
- Average sea temperature in December: 10.6°C
The best month for swimming (with the highest average sea temperature) is August (14.3°C).
The coldest month (with the lowest average sea temperature) is March (8.3°C).
Average daylight in December /
Average sunshine in December
Portrush, United Kingdom
- Average daylight in December: 7h and 1min
The month with the longest days is June (Average daylight: 17h and 18min).
The month with the shortest days is December (Average daylight: 7h and 12min).
- Average sunshine in December: 4h and 0min
The month with the most sunshine is June (Average sunshine: 8h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Portrush, United Kingdom
- Average sunshine days in December: 6.2 days
The month with the most sunshine days is April (9.8 days).
The month with the least sunshine days is August (4.2 days).
Average UV index in December
Portrush, United Kingdom
- Average UV index in December: 2
The months with the highest UV index are May, June, August and September (UV index 4).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Portrush, United Kingdom
- Average cloud cover in December: 62
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is April (Cloud cover 52).
Average visibility in December
Portrush, United Kingdom
- Average visibility in December: 9km
The month with the highest visibility is November (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October and December (9km).
Portrush, United Kingdom
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