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
December brings an average high-temperature of a frosty 8.5°C (47.3°F), nearly identical to the preceding month. With a barely noticeable fluctuation in temperature, Dún Laoghaire reaches an average low of 5.4°C (41.7°F) during the December nights.Humidity
In Dún Laoghaire, the average relative humidity in December is 84%.Rainfall
In Dún Laoghaire, in December, it is raining for 17 days, with typically 55mm (2.17") of accumulated precipitation. In Dún Laoghaire, Ireland, during the entire year, the rain falls for 200.5 days and collects up to 530mm (20.87") of precipitation.Snowfall
January through March, November and December are months with snowfall in Dún Laoghaire. December is the month with the most snowfall in Dún Laoghaire. Snow falls for 1.1 days and accumulates 9mm (0.35") of snow.Sea temperature
In Dún Laoghaire, Ireland, the average seawater temperature in December is 11.3°C (52.3°F).Note: Diving into 11.3°C (52.3°F) is practical below 10°C (50°F), given you're wearing protective swim gear; without it, expect a quick onset of cold shock and a struggle to breathe. Merely touching waters at 13°C (55.4°F) feels ice-cold.
Daylight
The month with the shortest days in Dún Laoghaire is December, with an average of 7h and 36min of daylight.On the first day of December in Dún Laoghaire, sunrise is at 8:17 am and sunset at 4:10 pm. On the last day of the month, sunrise is at 8:39 am and sunset at 4:16 pm GMT.
Sunshine
In Dún Laoghaire, the average sunshine in December is 4.6h.UV index
The months with the lowest UV index in Dún Laoghaire, Ireland, 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 vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 2 during December leads to these advisories:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Frequently asked questions
What are the temperatures in Dún Laoghaire in December?
What is the average humidity in December in Dún Laoghaire?
How much does it rain in Dún Laoghaire in December?
What is the snowiest month in Dún Laoghaire?
How many days does it snow in December in Dún Laoghaire?
What is the water temperature in December in Dún Laoghaire?
What is the month with the shortest days in Dún Laoghaire?
What is the average length of the day in December in Dún Laoghaire?
When is the sunrise / sunset in December in Dún Laoghaire?
How long on average sun shines in December in Dún Laoghaire?
When is the lowest UV index in Dún Laoghaire?
What is the UV index intensity in December in Dún Laoghaire?
Average temperature in December
Dún Laoghaire, Ireland
- Average high temperature in December: 8.5°C
The warmest months (with the highest average high temperature) are July and August (16.9°C).
The months with the lowest average high temperature are January and February (7.8°C).
- Average low temperature in December: 5.4°C
The month with the highest average low temperature is August (12.7°C).
The coldest month (with the lowest average low temperature) is February (4.4°C).
Average pressure in December
Dún Laoghaire, Ireland
- Average pressure in December: 1011.1mbar
The month with the highest atmospheric pressure is May (1016mbar).
The month with the lowest atmospheric pressure is November (1008.3mbar).
Average wind speed in December
Dún Laoghaire, Ireland
- Average wind speed in December: 25.9km/h
The windiest month (with the highest average wind speed) is December (25.9km/h).
The calmest month (with the lowest average wind speed) is July (15.9km/h).
Average humidity in December
Dún Laoghaire, Ireland
- Average humidity in December: 84%
The month with the highest relative humidity is July (86%).
The month with the lowest relative humidity is March (82%).
Average rainfall in December
Dún Laoghaire, Ireland
- Average rainfall in December: 55mm
The wettest month (with the highest rainfall) is November (71mm).
The driest month (with the least rainfall) is May (27mm).
Average rainfall days in December
Dún Laoghaire, Ireland
- Average rainfall days in December: 17 days
The month with the highest number of rainy days is July (20.4 days).
The months with the least rainy days are March and September (14.9 days).
Average snowfall in December
Dún Laoghaire, Ireland
- Average snowfall in December: 9mm
The month with the highest snowfall is December (9mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in December
Dún Laoghaire, Ireland
- Average snowfall days in December: 1.1 days
The months with the highest number of snowfall days are January and February (1.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature in December
Dún Laoghaire, Ireland
- Average sea temperature in December: 11.3°C
The best month for swimming (with the highest average sea temperature) is August (14.9°C).
The coldest month (with the lowest average sea temperature) is March (8.4°C).
Average daylight in December /
Average sunshine in December
Dún Laoghaire, Ireland
- 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: 4h and 4min
The month with the most sunshine is May (Average sunshine: 8h and 0min).
The month with the least sunshine is November (Average sunshine: 4h and 18min).
Average sunshine days in December
Dún Laoghaire, Ireland
- Average sunshine days in December: 10.2 days
The month with the most sunshine days is April (11.7 days).
The month with the least sunshine days is July (7.2 days).
Average UV index in December
Dún Laoghaire, Ireland
- 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).
Average cloud cover in December
Dún Laoghaire, Ireland
- Average cloud cover in December: 53
The months with the most cloud cover are February and November (Cloud cover 56).
The month with the least cloud cover is September (Cloud cover 48).
Average visibility in December
Dún Laoghaire, Ireland
- Average visibility in December: 9km
The months with the highest visibility are January, March, October and November (10km).
The months with the lowest visibility are February, April, May, June, July, August, September and December (9km).
Dún Laoghaire, Ireland
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