December weather forecast
Cork, Ireland

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Ancient buildings in Cork, Ireland, with dark cloudy skies and mountains in the distance
Ancient buildings in Cork, Ireland, with dark cloudy skies and mountains in the distance

Weather in December

With the arrival of December, Cork ushers in the winter season. December exhibits the lowest sunshine hours of the year, with an average of 2 hours a day, casting a cozy winter ambiance over the city. Christmas celebrations brighten up the city streets, creating a warm contrast to the cold, winter weather. Although the sea temperature drops, it still holds a moderate warmth compared to many other European cities. Even with colder temperatures and shorter days, the holiday spirit in Cork shines through making it a delightful time to visit.

Temperature

Entering December, the average high-temperature is recorded at a chilly 9°C (48.2°F), exhibiting a minimal shift from November's 10°C (50°F). Cork, during the nights of December, averages a temperature close to its daytime high, at an icy 4°C (39.2°F).

Rainfall

December is the month with the most rainfall. Rain falls for 20 days and accumulates 120mm (4.72") of precipitation.

Sea temperature

In Cork, in December, the average water temperature is 11.2°C (52.2°F).
Note: With the appropriate swimsuit, one can swim in 11.2°C (52.2°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

The month with the shortest days is December, with an average of 7h and 54min of daylight.
On the first day of the month, sunrise is at 8:19 am and sunset at 4:26 pm. On the last day of December, in Cork, Ireland, sunrise is at 8:41 am and sunset at 4:32 pm GMT.

Sunshine

January, February, November and December, with an average of 2h of sunshine, are months with the least sunshine in Cork.

UV index

The month with the lowest UV index in Cork, Ireland, is December, with an average maximum UV index of 0. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for average individuals.
Note: The maximum UV index of 0 during December leads to these instructions:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.

Frequently asked questions

What is the temperature in December in Cork?

In Cork, in December, the average high-temperature is 9°C (48.2°F), and the average low-temperature is 4°C (39.2°F).

What is the rainiest month in Cork?

December is the month with the most rainfall. Rain falls for 20 days and accumulates 120mm (4.72") of precipitation.

How many days does it rain in December in Cork?

In Cork, during December, the rain falls for 20 days and regularly aggregates up to 120mm (4.72") of precipitation.

What is the sea water temperature in December in Cork?

In December, the average sea temperature in Cork, Ireland, is 11.2°C (52.2°F). Swimming in 11.2°C (52.2°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 Cork?

December has the shortest days of the year in Cork, Ireland, with an average of 7h and 54min of daylight.

How many hours of daylight does Cork have in December?

The average day length in December in Cork, Ireland, is 7h and 52min.

When are sunrise and sunset in December in Cork?

In December, on the first day of the month, sunrise is at 8:19 am and sunset at 4:26 pm. On the last day of the month, sunrise is at 8:41 am and sunset at 4:32 pm GMT.

What is the month with the least sunshine in Cork?

January, February, November and December, with an average of 2h of sunshine, are months with the least sunshine in Cork, Ireland.

How many hours of sunshine does Cork have in December?

The average sunshine duration in December in Cork is 2h.

When is the lowest UV index in Cork?

December is the month with the lowest UV index, with an average maximum UV index of 0.

How high is the UV index in December in Cork?

In Cork, Ireland, the average daily maximum UV index in December is 0. A UV Index reading of 2, and below, represents a low health threat from exposure to the Sun's UV radiation.
Average high temperature
Average low temperature
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in December
Cork, Ireland

Average temperature in December - Cork, Ireland
  • Average high temperature in December: 9°C

The warmest month (with the highest average high temperature) is July (19°C).
The months with the lowest average high temperature are January and February (8°C).

  • Average low temperature in December: 4°C

The months with the highest average low temperature are July and August (11°C).
The coldest months (with the lowest average low temperature) are January and February (3°C).

Average rainfall in December
Cork, Ireland

Average rainfall in December - Cork, Ireland
  • Average rainfall in December: 120mm

The wettest month (with the highest rainfall) is December (120mm).
The driest months (with the least rainfall) are April and June (61mm).

Average rainfall days in December
Cork, Ireland

Average rainfall days in December - Cork, Ireland
  • Average rainfall days in December: 20 days

The month with the highest number of rainy days is January (21 days).
The month with the least rainy days is July (14 days).

Average sea temperature in December
Cork, Ireland

Average sea temperature in December - Cork, Ireland
  • Average sea temperature in December: 11.2°C

The best month for swimming (with the highest average sea temperature) is August (16.4°C).
The coldest month (with the lowest average sea temperature) is March (9.4°C).

Average daylight in December /
Average sunshine in December
Cork, Ireland

Average daylight in December / Average sunshine in December - Cork, Ireland
  • Average daylight in December: 7h and 5min

The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).

  • Average sunshine in December: 2h

The months with the most sunshine are May and June (Average sunshine: 6h).
The months with the least sunshine are January, February, November and December (Average sunshine: 2h).

Average UV index in December
Cork, Ireland

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

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

Cork, Ireland

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