December Weather in Trail, Canada

Last updated: June 18, 2025

In December, the average temperature in Trail, Canada hovers around -4°C (25°F), with extremes ranging from a chilly -28°C (-17°F) to a mild 11°C (52°F). Expect a significant precipitation total of 103 mm (4.1 in) spread over 15 days, and prepare for a high average humidity level of 93%.

December Temperature in Trail

In December in Trail, the average temperature is -4°C (25°F), with maximums reaching 11°C (52°F) and minimums plummeting to as low as -28°C (-17°F). Travelers should prepare for cold weather and pack warm clothing to ensure a comfortable visit.

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

The chart illustrates December temperature patterns in Trail, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Trail, December typically has an average temperature of -4°C (25°F), with highs reaching up to 11°C (52°F) and lows dropping to around -28°C (-17°F).

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

December Precipitation in Trail

In Trail in December, the precipitation amount is 103 mm (4.1 in) during a span of 15 days.

December Precipitation Trends in Trail

The chart displays monthly precipitation patterns in Trail, 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 Trail, December typically receives around 103 mm (4.1 inches) of precipitation spread over approximately 15 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 Trail

In Trail in December humidity is 93%. With an average temperature of -4°C (25°F), this humidity feels like a biting chill that clings to the skin, making even short excursions outdoors feel daunting and uncomfortable.

December Average Humidity in Trail

This chart illustrates the average monthly humidity levels in Trail, 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 Trail is approximately 93%, 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 Trail

In Trail 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 Trail.

Maximum UV Index Levels in Trail for December

The chart shows the monthly maximum UV Index (UVI) for Trail 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 Trail typically reaches 1, which falls under the low exposure category.

Data source: Trail 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 Trail Compares to Other Months

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

This table compares monthly weather conditions in Trail, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (24°F)	94 mm (3.7 inches)	90%	low
February Weather	-5°C (24°F)	80 mm (3.2 inches)	91%	moderate
March Weather	1°C (34°F)	84 mm (3.3 inches)	89%	moderate
April Weather	5°C (42°F)	83 mm (3.3 inches)	85%	high
May Weather	12°C (54°F)	68 mm (2.7 inches)	82%	very high
June Weather	16°C (61°F)	53 mm (2.1 inches)	81%	very high
July Weather	20°C (69°F)	17 mm (0.7 inches)	84%	very high
August Weather	20°C (68°F)	28 mm (1.1 inches)	75%	very high
September Weather	14°C (57°F)	56 mm (2.2 inches)	74%	high
October Weather	5°C (42°F)	79 mm (3.1 inches)	85%	moderate
November Weather	1°C (33°F)	102 mm (4.0 inches)	88%	low
December Weather	-4°C (25°F)	103 mm (4.1 inches)	93%	low