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December Weather in Callan, Ireland

Last updated: August 23, 2025

In December, the average temperature in Callan, Ireland hovers around 6°C (44°F). Expect lows of -5°C (23°F) and highs reaching up to 14°C (57°F). The region experiences 104 mm (4.1 in) of precipitation over approximately 14 days, resulting in a notably high average humidity of 89%.

December Temperature in Callan

In December in Callan, the average temperature is 6°C (44°F). The maximum can reach 14°C (57°F), and the minimum can be as low as -5°C (23°F). Travelers should be prepared for cool to mild weather, with the possibility of chilly nights.

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

The chart illustrates December temperature patterns in Callan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Callan, December typically has an average temperature of 6°C (44°F), with highs reaching up to 14°C (57°F) and lows dropping to around -5°C (23°F).
JanFebMarAprMayJunJulAugSepOctNovDec424344475257615956504543
Data source: Temperature data for Callan 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 Callan

In Callan in December, the precipitation amount is 104 mm (4.1 in) distributed over a span of 14 days.

December Precipitation Trends in Callan

The chart displays monthly precipitation patterns in Callan, 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 Callan, December typically receives around 104 mm (4.1 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec4994826367646393608687104
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Callan

In Callan 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 Callan

This chart illustrates the average monthly humidity levels in Callan, 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 Callan 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 Callan

In Callan 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 Callan.

Maximum UV Index Levels in Callan for December

The chart shows the monthly maximum UV Index (UVI) for Callan 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 Callan typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875421
Data source: Callan 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 Callan Compares to Other Months

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

This table compares monthly weather conditions in Callan, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)49 mm (1.9 inches)88%low
February Weather6°C (43°F)94 mm (3.7 inches)88%low
March Weather6°C (44°F)82 mm (3.2 inches)87%moderate
April Weather8°C (47°F)63 mm (2.5 inches)86%moderate
May Weather11°C (52°F)67 mm (2.6 inches)83%high
June Weather14°C (58°F)64 mm (2.5 inches)83%very high
July Weather16°C (61°F)63 mm (2.5 inches)85%very high
August Weather15°C (59°F)93 mm (3.7 inches)85%high
September Weather13°C (56°F)60 mm (2.4 inches)88%moderate
October Weather10°C (51°F)86 mm (3.4 inches)91%moderate
November Weather7°C (46°F)87 mm (3.4 inches)92%low
December Weather6°C (44°F)104 mm (4.1 inches)89%low

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