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December Weather in Castlerea, Ireland

Last updated: August 23, 2025

In December, the average temperature in Castlerea, Ireland hovers around 6°C (44°F), with minimums dipping to -5°C (23°F) and maximums reaching 13°C (56°F). Expect a precipitation amount of 106 mm (4.2 in) spread over approximately 17 days, resulting in a high average humidity of 89%. Prepare for a cool and rainy month!

December Temperature in Castlerea

In December in Castlerea, the average temperature is 6°C (44°F), with maximums reaching 13°C (56°F) and minimums dropping as low as -5°C (23°F). It's advisable to pack warm clothing if you plan to travel during this time, as temperatures can vary significantly.

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

The chart illustrates December temperature patterns in Castlerea, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castlerea, December typically has an average temperature of 6°C (44°F), with highs reaching up to 13°C (56°F) and lows dropping to around -5°C (23°F).
JanFebMarAprMayJunJulAugSepOctNovDec424344485357605955504543
Data source: Temperature data for Castlerea 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 Castlerea

In Castlerea in December, the precipitation amount is 106 mm (4.2 in) spread over 17 days.

December Precipitation Trends in Castlerea

The chart displays monthly precipitation patterns in Castlerea, 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 Castlerea, December typically receives around 106 mm (4.2 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec74122101628292841358411699106
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Castlerea

In Castlerea in December, humidity is 89%. With an average temperature of 6°C (44°F), this humidity feels like an uncomfortable chill that clings to your skin, making it difficult to enjoy outdoor activities and ideal for layered clothing.

December Average Humidity in Castlerea

This chart illustrates the average monthly humidity levels in Castlerea, 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 Castlerea is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%87%86%83%83%85%85%88%91%92%89%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Castlerea

In Castlerea in December, the maximum UV index is 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, you can check the Hourly UV Index in Castlerea.

Maximum UV Index Levels in Castlerea for December

The chart shows the monthly maximum UV Index (UVI) for Castlerea 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 Castlerea typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875321
Data source: Castlerea 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 Castlerea Compares to Other Months

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

This table compares monthly weather conditions in Castlerea, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (42°F)74 mm (2.9 inches)88%low
February Weather6°C (43°F)122 mm (4.8 inches)88%low
March Weather7°C (44°F)101 mm (4.0 inches)87%moderate
April Weather9°C (48°F)62 mm (2.4 inches)86%moderate
May Weather11°C (53°F)82 mm (3.2 inches)83%high
June Weather14°C (57°F)92 mm (3.6 inches)83%very high
July Weather15°C (60°F)84 mm (3.3 inches)85%very high
August Weather15°C (59°F)135 mm (5.3 inches)85%high
September Weather13°C (56°F)83 mm (3.3 inches)88%moderate
October Weather10°C (51°F)116 mm (4.6 inches)91%moderate
November Weather7°C (46°F)99 mm (3.9 inches)92%low
December Weather6°C (44°F)106 mm (4.2 inches)89%low

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