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December Weather in Roscommon, Ireland

Last updated: August 23, 2025

In December, the average temperature in Roscommon, Ireland hovers around 6°C (44°F). Expect chilly days with a minimum temperature of -5°C (24°F), while the maximum can reach 13°C (56°F). Be prepared for consistent rainfall, as 105 mm (4.1 in) of precipitation falls over 16 days. The air is quite humid too, with an average humidity level of 89%, making it a cool and damp experience overall.

December Temperature in Roscommon

In December in Roscommon, the average temperature is 6°C (44°F), with maximums reaching 13°C (56°F) and minimums plummeting to as low as -5°C (24°F). Travelers should be prepared for chilly weather and pack accordingly for both mild and cold conditions.

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

The chart illustrates December temperature patterns in Roscommon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Roscommon, 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 (24°F).
JanFebMarAprMayJunJulAugSepOctNovDec424344485357605956504643
Data source: Temperature data for Roscommon 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 Roscommon

In Roscommon in December, the precipitation amount is 105 mm (4.1 in) over a span of 16 days.

December Precipitation Trends in Roscommon

The chart displays monthly precipitation patterns in Roscommon, 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 Roscommon, December typically receives around 105 mm (4.1 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec7211796597790831328110897105
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Roscommon

In Roscommon 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 Roscommon

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

In Roscommon 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 Roscommon.

Maximum UV Index Levels in Roscommon for December

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

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

This table compares monthly weather conditions in Roscommon, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (42°F)72 mm (2.8 inches)88%low
February Weather6°C (43°F)117 mm (4.6 inches)88%low
March Weather7°C (44°F)96 mm (3.8 inches)87%moderate
April Weather9°C (48°F)59 mm (2.3 inches)86%moderate
May Weather12°C (53°F)77 mm (3.0 inches)83%high
June Weather14°C (57°F)90 mm (3.5 inches)83%very high
July Weather16°C (60°F)83 mm (3.3 inches)85%very high
August Weather15°C (59°F)132 mm (5.2 inches)85%high
September Weather13°C (56°F)80 mm (3.2 inches)88%moderate
October Weather10°C (51°F)108 mm (4.2 inches)91%moderate
November Weather8°C (46°F)97 mm (3.8 inches)92%low
December Weather6°C (44°F)105 mm (4.1 inches)89%low

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