December Weather in Millsboro, United States

Last updated: June 24, 2025

In December, the average temperature in Millsboro, United States hovers around 7°C (44°F). During this time, temperatures can dip as low as -9°C (17°F) or soar to a pleasant 21°C (70°F). Expect about 100 mm (3.9 in) of precipitation spread over 10 days, contributing to an average humidity of 84%. Prepare for a mix of cool days and moisture-laden air as you explore this unique destination!

December Temperature in Millsboro

In December in Millsboro, the average temperature is 7°C (44°F). Maximum temperatures can reach 21°C (70°F), while minimums can dip as low as -9°C (17°F). This variation makes it essential to pack layers and be prepared for both warm and cold weather when traveling to Millsboro during this time.

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

The chart illustrates December temperature patterns in Millsboro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Millsboro, December typically has an average temperature of 7°C (44°F), with highs reaching up to 21°C (70°F) and lows dropping to around -9°C (17°F).

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

December Precipitation in Millsboro

In Millsboro in December, the precipitation amount is 100 mm (3.9 in) over a span of 10 days.

December Precipitation Trends in Millsboro

The chart displays monthly precipitation patterns in Millsboro, 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 Millsboro, December typically receives around 100 mm (3.9 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 Millsboro

In Millsboro in December humidity is 84%. With an average temperature of 7°C (44°F), this humidity feels like a damp chill that seeps into your bones, making it uncomfortable for traveling and requiring extra layers to stay warm and dry.

December Average Humidity in Millsboro

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

In Millsboro in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Millsboro, you can check the information here.

Maximum UV Index Levels in Millsboro for December

The chart shows the monthly maximum UV Index (UVI) for Millsboro 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 Millsboro typically reaches 3, which falls under the moderate exposure category.

Data source: Millsboro 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 Millsboro Compares to Other Months

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

This table compares monthly weather conditions in Millsboro, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (40°F)	69 mm (2.7 inches)	84%	moderate
February Weather	6°C (43°F)	93 mm (3.7 inches)	83%	moderate
March Weather	8°C (47°F)	95 mm (3.7 inches)	83%	high
April Weather	14°C (57°F)	85 mm (3.3 inches)	81%	very high
May Weather	19°C (66°F)	116 mm (4.6 inches)	78%	very high
June Weather	24°C (75°F)	103 mm (4.1 inches)	79%	very high
July Weather	27°C (80°F)	147 mm (5.8 inches)	74%	very high
August Weather	26°C (78°F)	142 mm (5.6 inches)	72%	very high
September Weather	23°C (73°F)	99 mm (3.9 inches)	75%	very high
October Weather	18°C (64°F)	124 mm (4.9 inches)	81%	high
November Weather	10°C (51°F)	82 mm (3.2 inches)	85%	moderate
December Weather	7°C (44°F)	100 mm (3.9 inches)	84%	moderate