December Weather in Lewes, United States

Last updated: June 24, 2025

In December, the average temperature in Lewes, United States hovers around 6°C (44°F). Expect a chill with minimum temperatures dipping to -8°C (18°F), while the mercury can rise to a pleasant 19°C (67°F) on warmer days. Prepare for 109 mm (4.3 in) of precipitation spread over about 10 days, and keep in mind the average humidity is a substantial 84%.

December Temperature in Lewes

In December in Lewes, the average temperature is 6°C (44°F). Maximums can reach 19°C (67°F), while minimums can drop as low as -8°C (18°F). Be prepared for a mix of chilly days and mild weather if you're planning to travel during this time.

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

The chart illustrates December temperature patterns in Lewes, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lewes, December typically has an average temperature of 6°C (44°F), with highs reaching up to 19°C (67°F) and lows dropping to around -8°C (18°F).

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

December Precipitation in Lewes

In Lewes in December, the precipitation amount is 109 mm (4.3 in) spread over 10 days.

December Precipitation Trends in Lewes

The chart displays monthly precipitation patterns in Lewes, 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 Lewes, December typically receives around 109 mm (4.3 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 Lewes

In Lewes in December humidity is 84%. With an average temperature of 6°C (44°F), this humidity feels like a chilly dampness that clings to your skin, making outdoor activities less comfortable and necessitating layered clothing to stay warm and dry while exploring the area.

December Average Humidity in Lewes

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

In Lewes 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 Lewes, you can check the information here.

Maximum UV Index Levels in Lewes for December

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

Data source: Lewes 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 Lewes Compares to Other Months

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

This table compares monthly weather conditions in Lewes, 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 (39°F)	70 mm (2.8 inches)	84%	moderate
February Weather	5°C (42°F)	107 mm (4.2 inches)	83%	moderate
March Weather	8°C (46°F)	107 mm (4.2 inches)	83%	high
April Weather	13°C (55°F)	89 mm (3.5 inches)	81%	very high
May Weather	18°C (64°F)	131 mm (5.2 inches)	78%	very high
June Weather	23°C (74°F)	98 mm (3.9 inches)	79%	very high
July Weather	26°C (80°F)	141 mm (5.5 inches)	74%	very high
August Weather	25°C (78°F)	141 mm (5.6 inches)	72%	very high
September Weather	23°C (73°F)	104 mm (4.1 inches)	75%	very high
October Weather	18°C (64°F)	135 mm (5.3 inches)	81%	high
November Weather	10°C (51°F)	89 mm (3.5 inches)	85%	moderate
December Weather	6°C (44°F)	109 mm (4.3 inches)	84%	moderate