December Weather in Caledon, Canada

Last updated: June 18, 2025

In Caledon, Canada, the average temperature in December hovers around -2°C (29°F). While it can dip as low as -27°C (-16°F), the mercury can also rise to a maximum of 15°C (60°F). Expect approximately 70 mm (2.7 in) of precipitation spread over 12 days, with an average humidity of 87%.

December Temperature in Caledon

In December in Caledon, the average temperature is -2°C (29°F), with maximums reaching 15°C (60°F) and minimums dropping as low as -27°C (-16°F). It's advisable to dress warmly and be prepared for significant temperature fluctuations if you plan to travel during this time.

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

The chart illustrates December temperature patterns in Caledon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Caledon, December typically has an average temperature of -2°C (29°F), with highs reaching up to 15°C (60°F) and lows dropping to around -27°C (-16°F).

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

December Precipitation in Caledon

In Caledon in December, the precipitation amount is 70 mm (2.7 in) over the course of 12 days.

December Precipitation Trends in Caledon

The chart displays monthly precipitation patterns in Caledon, 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 Caledon, December typically receives around 70 mm (2.7 inches) of precipitation spread over approximately 12 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 Caledon

In Caledon in December humidity is 87%. With an average temperature of -2°C (29°F), this humidity feels like an uncomfortable chill that seeps into your bones, making it challenging to enjoy outdoor activities.

December Average Humidity in Caledon

This chart illustrates the average monthly humidity levels in Caledon, 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 Caledon is approximately 87%, 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 Caledon

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

Maximum UV Index Levels in Caledon for December

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

Data source: Caledon 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 Caledon Compares to Other Months

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

This table compares monthly weather conditions in Caledon, 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 (22°F)	66 mm (2.6 inches)	90%	low
February Weather	-5°C (24°F)	70 mm (2.8 inches)	90%	moderate
March Weather	0°C (32°F)	59 mm (2.3 inches)	87%	moderate
April Weather	5°C (42°F)	105 mm (4.1 inches)	87%	very high
May Weather	13°C (55°F)	97 mm (3.8 inches)	82%	very high
June Weather	19°C (66°F)	103 mm (4.0 inches)	81%	very high
July Weather	21°C (71°F)	84 mm (3.3 inches)	79%	very high
August Weather	20°C (69°F)	97 mm (3.8 inches)	80%	very high
September Weather	16°C (62°F)	71 mm (2.8 inches)	81%	high
October Weather	10°C (50°F)	101 mm (4.0 inches)	84%	moderate
November Weather	2°C (36°F)	75 mm (3.0 inches)	88%	moderate
December Weather	-2°C (29°F)	70 mm (2.7 inches)	87%	low