December Weather in Chatham, United States

Last updated: June 24, 2025

The average temperature in Chatham, United States during December hovers around 0°C (32°F), with a minimum dipping as low as -19°C (-2°F) and a maximum reaching 15°C (60°F). Expect about 99 mm (3.9 in) of precipitation spread over 12 days, while average humidity sits at a comfortable 84%.

December Temperature in Chatham

In December in Chatham, the average temperature is 0°C (32°F). The maximum can reach 15°C (60°F), and the minimum can be as low as -19°C (-2°F). Travelers should prepare for a wide range of temperatures and be ready for chilly conditions.

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 0°C (32°F), with highs reaching up to 15°C (60°F) and lows dropping to around -19°C (-2°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 99 mm (3.9 in) recorded over a span of 12 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 99 mm (3.9 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 Chatham

In Chatham in December, humidity is 84%. With an average temperature of 0°C (32°F), this humidity feels like a cold, damp chill that seeps into your clothes, making traveling uncomfortable and necessitating extra layers to stay warm despite the moisture-laden air.

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 84%, 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 (27°F)	73 mm (2.9 inches)	89%	moderate
February Weather	-1°C (30°F)	89 mm (3.5 inches)	88%	moderate
March Weather	2°C (36°F)	81 mm (3.2 inches)	86%	high
April Weather	8°C (47°F)	121 mm (4.8 inches)	84%	very high
May Weather	15°C (58°F)	107 mm (4.2 inches)	76%	very high
June Weather	20°C (68°F)	75 mm (3.0 inches)	72%	very high
July Weather	23°C (73°F)	114 mm (4.5 inches)	66%	very high
August Weather	22°C (72°F)	92 mm (3.6 inches)	64%	very high
September Weather	18°C (65°F)	100 mm (3.9 inches)	72%	high
October Weather	12°C (54°F)	136 mm (5.4 inches)	81%	high
November Weather	4°C (40°F)	95 mm (3.7 inches)	87%	moderate
December Weather	0°C (32°F)	99 mm (3.9 inches)	84%	low