December Weather in Bangor, United States

Last updated: June 24, 2025

In December, the average temperature in Bangor, United States hovers around -3°C (27°F). However, don't be fooled by the average—temperatures can plunge to a chilly -24°C (-12°F) or peak at a mild 17°C (63°F). Expect about 45 mm (1.8 in) of precipitation spread over 7 days and enjoy the crisp air with an average humidity of 82%.

December Temperature in Bangor

In December in Bangor, the average temperature is -3°C (27°F). The maximum can reach 17°C (63°F), while the minimum can drop as low as -24°C (-12°F). Travelers should be prepared for a wide range of temperatures during this time.

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

The chart illustrates December temperature patterns in Bangor, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bangor, December typically has an average temperature of -3°C (27°F), with highs reaching up to 17°C (63°F) and lows dropping to around -24°C (-12°F).

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

December Precipitation in Bangor

In Bangor in December, the precipitation amount is 45 mm (1.8 in) spread over a duration of 7 days.

December Precipitation Trends in Bangor

The chart displays monthly precipitation patterns in Bangor, 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 Bangor, December typically receives around 45 mm (1.8 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 Bangor

In Bangor in December, humidity is 82%. With an average temperature of -3°C (27°F), this humidity feels like a biting chill that seeps into your bones, making traveling uncomfortable and necessitating extra layers to stay warm while navigating through the damp air.

December Average Humidity in Bangor

This chart illustrates the average monthly humidity levels in Bangor, 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 Bangor is approximately 82%, 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 Bangor

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

Maximum UV Index Levels in Bangor for December

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

Data source: Bangor 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 Bangor Compares to Other Months

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

This table compares monthly weather conditions in Bangor, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-7°C (19°F)	36 mm (1.4 inches)	84%	low
February Weather	-6°C (21°F)	50 mm (2.0 inches)	85%	moderate
March Weather	2°C (35°F)	57 mm (2.2 inches)	84%	moderate
April Weather	7°C (45°F)	86 mm (3.4 inches)	83%	very high
May Weather	15°C (59°F)	137 mm (5.4 inches)	75%	very high
June Weather	21°C (71°F)	125 mm (4.9 inches)	79%	very high
July Weather	23°C (74°F)	100 mm (3.9 inches)	75%	very high
August Weather	21°C (70°F)	121 mm (4.8 inches)	69%	very high
September Weather	18°C (64°F)	105 mm (4.1 inches)	74%	high
October Weather	10°C (50°F)	114 mm (4.5 inches)	79%	moderate
November Weather	2°C (35°F)	51 mm (2.0 inches)	88%	moderate
December Weather	-3°C (27°F)	45 mm (1.8 inches)	82%	low