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December Weather in Dublin, United States

Last updated: June 24, 2025

In December, the average temperature in Dublin, United States is a brisk 4°C (40°F). Expect chilly days with temperatures dipping as low as -14°C (7°F), while highs can reach a pleasant 20°C (69°F). With an average humidity of 86%, the air can feel quite damp. Be prepared for 87 mm (3.4 in) of precipitation over 8 days, making a waterproof jacket a wise choice for your adventures!

December Temperature in Dublin

In December in Dublin, the average temperature is 4°C (40°F). Maximums can reach 20°C (69°F), while minimums can drop as low as -14°C (7°F). Be sure to pack layers to stay comfortable during your travels!

December Weather in Dublin: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Dublin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Dublin, December typically has an average temperature of 4°C (40°F), with highs reaching up to 20°C (69°F) and lows dropping to around -14°C (7°F).
JanFebMarAprMayJunJulAugSepOctNovDec354145546369737267584440
Data source: Temperature data for Dublin generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Dublin

In Dublin in December, the precipitation amount is 87 mm (3.4 in), which occurs over a span of 8 days.

December Precipitation Trends in Dublin

The chart displays monthly precipitation patterns in Dublin, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Dublin, December typically receives around 87 mm (3.4 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec661058410510285618695976287
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Dublin

In Dublin in December humidity is 86%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and travel cumbersome as you navigate through a thick, heavy air that clings to your skin.

December Average Humidity in Dublin

This chart illustrates the average monthly humidity levels in Dublin, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Dublin is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%86%84%83%83%79%66%68%78%89%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Dublin

In Dublin in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Dublin, you can check the information here.

Maximum UV Index Levels in Dublin for December

The chart shows the monthly maximum UV Index (UVI) for Dublin in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Dublin typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111010753
Data source: Dublin December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How December Weather in Dublin Compares to Other Months

Weather in Dublin varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Dublin, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Dublin, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)66 mm (2.6 inches)87%moderate
February Weather5°C (41°F)105 mm (4.1 inches)87%high
March Weather7°C (46°F)84 mm (3.3 inches)86%very high
April Weather12°C (54°F)105 mm (4.1 inches)84%very high
May Weather17°C (63°F)102 mm (4.0 inches)83%extreme
June Weather21°C (69°F)85 mm (3.3 inches)83%extreme
July Weather23°C (74°F)61 mm (2.4 inches)79%extreme
August Weather22°C (72°F)86 mm (3.4 inches)66%very high
September Weather20°C (67°F)95 mm (3.7 inches)68%very high
October Weather14°C (58°F)97 mm (3.8 inches)78%high
November Weather6°C (44°F)61 mm (2.4 inches)89%moderate
December Weather4°C (40°F)87 mm (3.4 inches)86%moderate

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