December Weather in Orono, United States

Last updated: June 24, 2025

In December, the average temperature in Orono, United States hovers around -4°C (26°F), with a minimum dipping as low as -25°C (-14°F) and peaking at 15°C (60°F). Expect about 116 mm (4.6 in) of precipitation over approximately 10 days, coupled with an average humidity of 84%. This chilly month offers a unique atmosphere, perfect for winter enthusiasts!

December Temperature in Orono

In December in Orono, the average temperature is -4°C (26°F). The maximum can reach 15°C (60°F), while the minimum can drop as low as -25°C (-14°F). Travelers should be prepared for a wide range of temperatures, so pack accordingly to enjoy the diverse weather conditions.

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

The chart illustrates December temperature patterns in Orono, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Orono, December typically has an average temperature of -4°C (26°F), with highs reaching up to 15°C (60°F) and lows dropping to around -25°C (-14°F).

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

December Precipitation in Orono

In Orono in December, the total precipitation amount is 116 mm (4.6 in) over a span of 10 days.

December Precipitation Trends in Orono

The chart displays monthly precipitation patterns in Orono, 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 Orono, December typically receives around 116 mm (4.6 inches) of precipitation spread over approximately 10 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 Orono

In Orono in December, humidity is 84%. With an average temperature of -4°C (26°F), this humidity feels like a biting cold that seeps through your layers, making outdoor activities brisk and invigorating but challenging for sustained exploration.

December Average Humidity in Orono

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

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

Maximum UV Index Levels in Orono for December

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

Data source: Orono 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 Orono Compares to Other Months

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

This table compares monthly weather conditions in Orono, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (21°F)	90 mm (3.6 inches)	88%	low
February Weather	-5°C (23°F)	82 mm (3.2 inches)	88%	moderate
March Weather	-1°C (30°F)	72 mm (2.8 inches)	85%	moderate
April Weather	6°C (43°F)	125 mm (4.9 inches)	81%	high
May Weather	12°C (54°F)	98 mm (3.9 inches)	76%	very high
June Weather	18°C (64°F)	88 mm (3.5 inches)	74%	very high
July Weather	21°C (70°F)	96 mm (3.8 inches)	74%	very high
August Weather	20°C (69°F)	78 mm (3.1 inches)	74%	very high
September Weather	16°C (61°F)	76 mm (3.0 inches)	77%	high
October Weather	10°C (50°F)	119 mm (4.7 inches)	82%	moderate
November Weather	2°C (36°F)	119 mm (4.7 inches)	85%	moderate
December Weather	-4°C (26°F)	116 mm (4.6 inches)	84%	low