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December Weather in Birr, Ireland

Last updated: August 23, 2025

In Birr, Ireland, the average temperature in December hovers around 6°C (44°F). During this time, temperatures can dip as low as -6°C (21°F) and rise to a pleasant 14°C (57°F). Be prepared for some rain, as the region experiences 104 mm (4.1 in) of precipitation spread over 17 days. With an average humidity of 89%, it’s a month where you might want to keep that umbrella handy!

December Temperature in Birr

In December in Birr, the average temperature is 6°C (44°F). Maximums can reach 14°C (57°F), and minimums can drop as low as -6°C (21°F). Travelers should be prepared for a mix of cool to mild weather, making layering a practical choice for outdoor activities.

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

The chart illustrates December temperature patterns in Birr, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Birr, 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 -6°C (21°F).
JanFebMarAprMayJunJulAugSepOctNovDec424344485357605956514644
Data source: Temperature data for Birr 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 Birr

In Birr in December, the precipitation amount is 104 mm (4.1 in) over a span of 17 days.

December Precipitation Trends in Birr

The chart displays monthly precipitation patterns in Birr, 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 Birr, December typically receives around 104 mm (4.1 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec621039454666974103759088104
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Birr

In Birr 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 Birr

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

In Birr 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 Birr.

Maximum UV Index Levels in Birr for December

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

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

This table compares monthly weather conditions in Birr, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (42°F)62 mm (2.4 inches)88%low
February Weather6°C (43°F)103 mm (4.0 inches)88%low
March Weather7°C (44°F)94 mm (3.7 inches)87%moderate
April Weather9°C (48°F)54 mm (2.1 inches)86%moderate
May Weather11°C (53°F)66 mm (2.6 inches)83%high
June Weather14°C (58°F)69 mm (2.7 inches)83%very high
July Weather16°C (61°F)74 mm (2.9 inches)85%very high
August Weather15°C (59°F)103 mm (4.0 inches)85%high
September Weather13°C (56°F)75 mm (3.0 inches)88%moderate
October Weather10°C (51°F)90 mm (3.5 inches)91%moderate
November Weather8°C (46°F)88 mm (3.5 inches)92%low
December Weather6°C (44°F)104 mm (4.1 inches)89%low

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