January Weather in Wilmington, United States

Last updated: June 24, 2025

In Wilmington, United States, the average temperature in January hovers around -1°C (31°F). Visitors can expect a chilly range, with minimums dipping to -21°C (-6°F) and highs reaching up to 21°C (69°F). During this time, the area also sees an average precipitation of 71 mm (2.8 in) spread across 8 days, contributing to an average humidity level of 86%.

January Temperature in Wilmington

In January in Wilmington, the average temperature is -1°C (31°F). Maximum temperatures can reach 21°C (69°F), while minimums can drop as low as -21°C (-6°F). Travelers should be prepared for a wide range of weather conditions during this time.

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

The chart illustrates January temperature patterns in Wilmington, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Wilmington, January typically has an average temperature of -1°C (31°F), with highs reaching up to 21°C (69°F) and lows dropping to around -21°C (-6°F).

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

January Precipitation in Wilmington

In Wilmington in January, the precipitation amount is 71 mm (2.8 in) over the course of 8 days.

January Precipitation Trends in Wilmington

The chart displays monthly precipitation patterns in Wilmington, 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 Wilmington, January typically receives around 71 mm (2.8 inches) of precipitation spread over approximately 8 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 Wilmington

In Wilmington in January humidity is 86%. With an average temperature of -1°C (31°F), this humidity feels like an eerie chill enveloping you, making travel uncomfortable as the damp air bites into your skin and the cold seeps through even the warmest of clothes, creating an atmosphere that is heavy and uninviting.

January Average Humidity in Wilmington

This chart illustrates the average monthly humidity levels in Wilmington, 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 Wilmington is approximately 86%, 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 Wilmington

In Wilmington 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 Wilmington, you can check the information here.

Maximum UV Index Levels in Wilmington for January

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

Data source: Wilmington 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 Wilmington Compares to Other Months

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

This table compares monthly weather conditions in Wilmington, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (31°F)	71 mm (2.8 inches)	86%	moderate
February Weather	0°C (33°F)	87 mm (3.4 inches)	84%	moderate
March Weather	3°C (38°F)	89 mm (3.5 inches)	82%	moderate
April Weather	9°C (48°F)	127 mm (5.0 inches)	80%	very high
May Weather	15°C (59°F)	86 mm (3.4 inches)	72%	very high
June Weather	20°C (69°F)	85 mm (3.4 inches)	72%	very high
July Weather	23°C (74°F)	125 mm (4.9 inches)	67%	very high
August Weather	23°C (74°F)	79 mm (3.1 inches)	66%	very high
September Weather	19°C (67°F)	79 mm (3.1 inches)	71%	high
October Weather	13°C (56°F)	132 mm (5.2 inches)	78%	high
November Weather	6°C (43°F)	95 mm (3.7 inches)	84%	moderate
December Weather	1°C (34°F)	119 mm (4.7 inches)	81%	low