December weather forecast
Dublin, Ireland

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The illuminated Ha Penny Bridge reflected in the water below, in Dublin, Ireland
The illuminated Ha Penny Bridge reflected in the water below, in Dublin, Ireland

Weather in December

With December, winter is in full swing in Dublin, and temperatures keep to the colder side of the spectrum. The city's low temperature sinks to around 4.5°C (40.1°F), the lowest during the year. Clouds often gather, adding to the overcast atmosphere and scaling up the winter charm. Frequent rains, paired with chilly winds, complete the city's transition into a winter landscape. Despite the dipping thermometers and reduced daylight hours, December still holds a charm infused with the holiday spirit and wintry majesty.

Temperature

The advent of December denotes an average high-temperature of a frosty 9.3°C (48.7°F), subtly different from November's 11°C (51.8°F). Dublin sees a gentle drop from the daily peak temperature in December, with an average low settling at an icy 4.5°C (40.1°F).

Rainfall

In Dublin, in December, during 12 rainfall days, 69mm (2.72") of precipitation is typically accumulated. Throughout the year, in Dublin, there are 128 rainfall days, and 714mm (28.11") of precipitation is accumulated.

Sea temperature

In Dublin, the average seawater temperature in December is 11.3°C (52.3°F).
Note: Diving into 11.3°C (52.3°F) when it's under 10°C (50°F) can cause immediate cold shock symptoms, marked by hyperventilation.

Daylight

December has the shortest days of the year, with an average of 7h and 36min of daylight.
On the first day of the month, sunrise is at 8:17 am and sunset at 4:10 pm. On the last day of December, sunrise is at 8:40 am and sunset at 4:16 pm GMT.

Sunshine

With an average of 1.7h of sunshine, December has the least sunshine of the year.

UV index

The months with the lowest UV index in Dublin are January and December, with an average maximum UV index of 0. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the average person.
Note: The daily high UV index of 0 during December translates into the following recommendations:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.

Frequently asked questions

What are the temperatures in Dublin in December?

In December, the average high-temperature and low-temperature in Dublin, Ireland, are 9.3°C (48.7°F) and 4.5°C (40.1°F) respectively.

How many days does it rain in December in Dublin?

In Dublin, Ireland, during December, the rain falls for 12 days and regularly aggregates up to 69mm (2.72") of precipitation.

What is the sea water temperature in December in Dublin?

In December, the average sea temperature is 11.3°C (52.3°F). Swimming in 11.3°C (52.3°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

What is the month with the shortest days in Dublin?

The month with the shortest days in Dublin is December, with an average of 7h and 36min of daylight.

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

The average day length in December in Dublin, Ireland, is 7h and 37min.

When are sunrise and sunset in December in Dublin?

In December, on the first day of the month, sunrise is at 8:17 am and sunset at 4:10 pm. On the last day of the month, in Dublin, Ireland, sunrise is at 8:40 am and sunset at 4:16 pm GMT.

What is the month with the least sunshine in Dublin?

The month with the least sunshine in Dublin, Ireland, is December, with an average of 1.7h of sunshine.

How many hours of sunshine does Dublin have in December?

The average sunshine duration in December is 1.7h.

What is the month with the lowest UV index in Dublin?

The months with the lowest UV index in Dublin, Ireland, are January and December, with an average maximum UV index of 0.

What is the UV index intensity in December in Dublin?

In December, the average daily maximum UV index is 0. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to Sun's UV rays.
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in December
Dublin, Ireland

Average temperature in December - Dublin, Ireland
  • Average high temperature in December: 9.3°C

The warmest month (with the highest average high temperature) is July (20.2°C).
The month with the lowest average high temperature is January (8.8°C).

  • Average low temperature in December: 4.5°C

The month with the highest average low temperature is July (13.5°C).
The coldest months (with the lowest average low temperature) are January and February (3.9°C).

Average rainfall in December
Dublin, Ireland

Average rainfall in December - Dublin, Ireland
  • Average rainfall in December: 68.7mm

The wettest month (with the highest rainfall) is October (76mm).
The driest month (with the least rainfall) is February (46.1mm).

Average rainfall days in December
Dublin, Ireland

Average rainfall days in December - Dublin, Ireland
  • Average rainfall days in December: 12 days

The months with the highest number of rainy days are January, October and December (12 days).
The months with the least rainy days are June and September (9 days).

Average sea temperature in December
Dublin, Ireland

Average sea temperature in December - Dublin, 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
Dublin, Ireland

Average daylight in December / Average sunshine in December - Dublin, 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: 1h and 4min

The month with the most sunshine is May (Average sunshine: 6h and 18min).
The month with the least sunshine is December (Average sunshine: 1h and 42min).

Average UV index in December
Dublin, Ireland

Average UV index in December - Dublin, Ireland
  • Average UV index in December: 0

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 0).

Dublin, Ireland

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