December Weather in Killarney, Canada

Last updated: June 18, 2025

In December, the average temperature in Killarney, Canada hovers around -10°C (15°F). However, be prepared for extreme variations, as temperatures can plummet to a bone-chilling -36°C (-33°F) or rise to a maximum of 7°C (45°F). While you may brave the cold, expect about 23 mm (0.9 in) of precipitation spread over 6 days, contributing to an impressive average humidity of 91%. Stay warm!

December Temperature in Killarney

In December in Killarney, the average temperature is -10°C (15°F), with maximums reaching 7°C (45°F) and minimums dipping as low as -36°C (-33°F). Travelers should be prepared for extreme cold conditions and dress warmly if visiting during this time.

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

The chart illustrates December temperature patterns in Killarney, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Killarney, December typically has an average temperature of -10°C (15°F), with highs reaching up to 7°C (45°F) and lows dropping to around -36°C (-33°F).

Data source: Temperature data for Killarney generated using information from the Copernicus Climate Change Service.

December Precipitation in Killarney

In Killarney in December, the precipitation amount is 23 mm (0.9 in) spread over 6 days.

December Precipitation Trends in Killarney

The chart displays monthly precipitation patterns in Killarney, 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 Killarney, December typically receives around 23 mm (0.9 inches) of precipitation spread over approximately 6 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Killarney

In Killarney in December humidity is 91%. With an average temperature of -10°C (15°F), this humidity feels like an eerie chill that penetrates your bones, making outdoor travel uncomfortable and increasing the risk of frostbite, even with layers of clothing.

December Average Humidity in Killarney

This chart illustrates the average monthly humidity levels in Killarney, 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 Killarney is approximately 91%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Killarney

In Killarney in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Killarney, you can visit Hourly UV Index in Killarney.

Maximum UV Index Levels in Killarney for December

The chart shows the monthly maximum UV Index (UVI) for Killarney 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 Killarney typically reaches 2, which falls under the low exposure category.

Data source: Killarney 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 Killarney Compares to Other Months

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

This table compares monthly weather conditions in Killarney, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-13°C (8°F)	15 mm (0.6 inches)	92%	low
February Weather	-15°C (5°F)	15 mm (0.6 inches)	90%	moderate
March Weather	-5°C (23°F)	27 mm (1.1 inches)	88%	moderate
April Weather	2°C (35°F)	26 mm (1.0 inches)	81%	very high
May Weather	11°C (52°F)	40 mm (1.6 inches)	74%	very high
June Weather	18°C (64°F)	87 mm (3.4 inches)	72%	very high
July Weather	20°C (68°F)	63 mm (2.5 inches)	74%	very high
August Weather	18°C (65°F)	70 mm (2.8 inches)	76%	very high
September Weather	13°C (56°F)	74 mm (2.9 inches)	73%	high
October Weather	4°C (40°F)	48 mm (1.9 inches)	76%	moderate
November Weather	-5°C (24°F)	29 mm (1.1 inches)	86%	low
December Weather	-10°C (15°F)	23 mm (0.9 inches)	91%	low