December Weather in Altona, Canada

Last updated: June 18, 2025

In Altona, Canada, the average temperature for December hovers around -9°C (16°F), with minimums plunging to -33°C (-26°F) and maximums reaching up to 7°C (46°F). Expect 27 mm (1.1 in) of precipitation spread over 7 days, accompanied by a high average humidity of 91%. Stay warm and prepared for the chilly conditions!

December Temperature in Altona

In December in Altona, the average temperature is -9°C (16°F), with a maximum that can reach 7°C (46°F) and a minimum that can dip as low as -33°C (-26°F). It's advisable to bundle up and prepare for extreme cold if you plan to travel during this time.

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

The chart illustrates December temperature patterns in Altona, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Altona, December typically has an average temperature of -9°C (16°F), with highs reaching up to 7°C (46°F) and lows dropping to around -33°C (-26°F).

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

December Precipitation in Altona

In Altona in December, the precipitation amount is 27 mm (1.1 in) accumulated over 7 days.

December Precipitation Trends in Altona

The chart displays monthly precipitation patterns in Altona, 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 Altona, December typically receives around 27 mm (1.1 inches) of precipitation spread over approximately 7 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 Altona

In Altona in December humidity is 91%. With an average temperature of -9°C (16°F), this humidity feels like a heavy veil wrapping around you, making outdoor exploration quite challenging as you navigate through the chilly air that seems to cling to your skin.

December Average Humidity in Altona

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

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

Maximum UV Index Levels in Altona for December

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

Data source: Altona 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 Altona Compares to Other Months

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

This table compares monthly weather conditions in Altona, 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 (9°F)	16 mm (0.6 inches)	92%	low
February Weather	-15°C (6°F)	17 mm (0.7 inches)	90%	moderate
March Weather	-5°C (24°F)	19 mm (0.7 inches)	88%	moderate
April Weather	3°C (37°F)	25 mm (1.0 inches)	81%	high
May Weather	13°C (55°F)	46 mm (1.8 inches)	74%	very high
June Weather	20°C (67°F)	73 mm (2.9 inches)	72%	very high
July Weather	22°C (71°F)	59 mm (2.3 inches)	74%	very high
August Weather	20°C (68°F)	58 mm (2.3 inches)	76%	very high
September Weather	14°C (58°F)	78 mm (3.1 inches)	73%	high
October Weather	6°C (43°F)	72 mm (2.8 inches)	76%	moderate
November Weather	-4°C (25°F)	27 mm (1.1 inches)	86%	low
December Weather	-9°C (16°F)	27 mm (1.1 inches)	91%	low