December Weather in Chatham, Canada

Last updated: June 18, 2025

In December, the average temperature in Chatham, Canada hovers around 1°C (33°F). Expect a chilly range, with minimums dipping to -20°C (-4°F) and maximums reaching up to 16°C (61°F). This month, precipitation averages 64 mm (2.5 in) over approximately 11 days, and the air can feel quite humid, with an average humidity level of 87%.

December Temperature in Chatham

In December in Chatham, the average temperature is 1°C (33°F). The maximum can reach 16°C (61°F), and the minimum can be as low as -20°C (-4°F). Travelers should be prepared for a wide range of temperatures and dress in layers to stay comfortable.

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

The chart illustrates December temperature patterns in Chatham, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Chatham, December typically has an average temperature of 1°C (33°F), with highs reaching up to 16°C (61°F) and lows dropping to around -20°C (-4°F).

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

December Precipitation in Chatham

In Chatham in December, the total precipitation amount is 64 mm (2.5 in) spread over 11 days.

December Precipitation Trends in Chatham

The chart displays monthly precipitation patterns in Chatham, 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 Chatham, December typically receives around 64 mm (2.5 inches) of precipitation spread over approximately 11 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 Chatham

In Chatham in December, humidity is 87%. With an average temperature of 1°C (33°F), this humidity feels like a chilling blanket, making traveling uncomfortable as the cold air clings to your skin, amplifying the frosty bite and dampness that can quickly lead to a sense of unease.

December Average Humidity in Chatham

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

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

Maximum UV Index Levels in Chatham for December

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

Data source: Chatham 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 Chatham Compares to Other Months

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

This table compares monthly weather conditions in Chatham, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (28°F)	67 mm (2.6 inches)	90%	low
February Weather	-2°C (29°F)	69 mm (2.7 inches)	90%	moderate
March Weather	2°C (36°F)	71 mm (2.8 inches)	87%	moderate
April Weather	8°C (46°F)	96 mm (3.8 inches)	87%	very high
May Weather	14°C (58°F)	104 mm (4.1 inches)	82%	very high
June Weather	21°C (69°F)	96 mm (3.8 inches)	81%	very high
July Weather	23°C (74°F)	95 mm (3.8 inches)	79%	very high
August Weather	22°C (73°F)	83 mm (3.2 inches)	80%	very high
September Weather	19°C (66°F)	76 mm (3.0 inches)	81%	very high
October Weather	13°C (55°F)	108 mm (4.2 inches)	84%	high
November Weather	5°C (40°F)	80 mm (3.2 inches)	88%	moderate
December Weather	1°C (33°F)	64 mm (2.5 inches)	87%	low