January Weather in Lewes, United States

Last updated: June 24, 2025

In January, the average temperature in Lewes, United States hovers around 4°C (39°F). Expect fluctuations, with minimums dipping to -13°C (9°F) and maximums reaching 19°C (66°F). This month features a precipitation total of 70 mm (2.8 in) spread over 9 days, contributing to the average humidity of 84%.

January Temperature in Lewes

In January in Lewes, the average temperature is 4°C (39°F), with a maximum that can reach 19°C (66°F) and a minimum that can drop as low as -13°C (9°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both mild and cold conditions.

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

The chart illustrates January 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, January typically has an average temperature of 4°C (39°F), with highs reaching up to 19°C (66°F) and lows dropping to around -13°C (9°F).

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

January Precipitation in Lewes

In Lewes in January, the total precipitation amount is 70 mm (2.8 in) spread over 9 days.

January Precipitation Trends in Lewes

The chart displays monthly precipitation patterns in Lewes, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Lewes, January typically receives around 70 mm (2.8 inches) of precipitation spread over approximately 9 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

January Humidity in Lewes

In Lewes in January, humidity is 84%. With an average temperature of 4°C (39°F), this humidity feels like a damp chill that seeps into your bones, making outdoor excursions uncomfortable and demanding more layers than you anticipate while traveling.

January Average Humidity in Lewes

This chart illustrates the average monthly humidity levels in Lewes, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Lewes is approximately 84%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Lewes

In Lewes in January, 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 January

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

Data source: Lewes January 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 January 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 January’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 January’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