December Weather in Shannon, Canada

Last updated: June 18, 2025

In December, the average temperature in Shannon, Canada hovers around -9°C (16°F). During this month, temperatures can dip as low as -28°C (-18°F) and reach a maximum of 11°C (52°F). Precipitation is prevalent, with an average of 126 mm (5.0 in) expected over 13 days, contributing to a high average humidity of 92%.

December Temperature in Shannon

In December in Shannon, the average temperature is -9°C (16°F). Maximums can reach 11°C (52°F), and minimums can be as low as -28°C (-18°F). Travelers should be prepared for extreme cold and dress accordingly to enjoy their visit.

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

The chart illustrates December temperature patterns in Shannon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Shannon, December typically has an average temperature of -9°C (16°F), with highs reaching up to 11°C (52°F) and lows dropping to around -28°C (-18°F).

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

December Precipitation in Shannon

In Shannon in December, the precipitation amount is 126 mm (5.0 in) over the course of 13 days.

December Precipitation Trends in Shannon

The chart displays monthly precipitation patterns in Shannon, 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 Shannon, December typically receives around 126 mm (5.0 inches) of precipitation spread over approximately 13 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 Shannon

In Shannon in December, humidity is 92%. With an average temperature of -9°C (16°F), this humidity feels like an icy embrace that seeps into your bones, making outdoor activities feel even more challenging and the air thick with moisture, creating an eerie chill that dampens your spirits while traveling.

December Average Humidity in Shannon

This chart illustrates the average monthly humidity levels in Shannon, 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 Shannon is approximately 92%, 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 Shannon

In Shannon 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 Shannon, you can visit Hourly UV Index in Shannon.

Maximum UV Index Levels in Shannon for December

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

Data source: Shannon 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 Shannon Compares to Other Months

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

This table compares monthly weather conditions in Shannon, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-12°C (11°F)	95 mm (3.7 inches)	95%	low
February Weather	-11°C (13°F)	94 mm (3.7 inches)	93%	moderate
March Weather	-5°C (22°F)	106 mm (4.2 inches)	90%	moderate
April Weather	2°C (36°F)	121 mm (4.8 inches)	87%	very high
May Weather	10°C (50°F)	114 mm (4.5 inches)	79%	very high
June Weather	15°C (60°F)	150 mm (5.9 inches)	73%	very high
July Weather	18°C (65°F)	137 mm (5.4 inches)	81%	very high
August Weather	17°C (63°F)	136 mm (5.3 inches)	81%	very high
September Weather	13°C (55°F)	127 mm (5.0 inches)	81%	high
October Weather	6°C (43°F)	152 mm (6.0 inches)	87%	moderate
November Weather	-2°C (28°F)	152 mm (6.0 inches)	89%	moderate
December Weather	-9°C (16°F)	126 mm (5.0 inches)	92%	low