Long-term weather forecast
Long-term weather forecast

December weather forecast and Climate
Dublin, Ireland

A sunset view of the illuminated Ha Penny Bridge reflected in the water below, found in Dublin, Ireland
A sunset view of the illuminated Ha Penny Bridge reflected in the water below, found in Dublin, Ireland
December signals the start of the temperate winter and the mildly cold weather. The sunshine lasts daily only for 1.7 hours, while daylight is available for 8 hours at the maximum. Daily average high is a chilly 7.8°C (46°F), and frost is common along with early morning fog. Snow is a remote possibility in the face of cold winds.
A foggy morning calls for an alternative mode of transport over self-driving in Dublin due to its excellent network of roads, rails, trams, and ferries. Cold winter is a wonderful time to party at the Temple Bar riverside neighborhood.
  • The 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).

  • The average low temperature in December: 4.5°C

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

  • The average rainfall in December: 68.7mm

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

  • The average rainfall days in December: 12 days

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

  • The 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).

  • The average daylight in December: 8h

The month with the longest days is June (Average daylight: 17h).
Months with shortest days are January and December (Average daylight: 8h).

  • The average sunshine in December: 1.7h

The month with most sunshine is May (Average sunshine: 6.3h).
The month with least sunshine is December (Average sunshine: 1.7h).

  • The average UV index in December: 0

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