January Weather in Dover, United States

Last updated: June 24, 2025

In Dover, United States, the average temperature in January hovers around 4°C (40°F). However, be prepared for a range of weather as the minimum can dip to a brisk -17°C (2°F), while the maximum can reach a mild 21°C (70°F). Expect about 100 mm (3.9 in) of precipitation spread over 10 days, contributing to an average humidity of 86%. Be sure to dress accordingly and enjoy the season!

January Temperature in Dover

In January in Dover, the average temperature is 4°C (40°F), with maximums reaching up to 21°C (70°F) and minimums dropping as low as -17°C (2°F). Be prepared for a wide range of temperatures if you plan to travel during this time.

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

The chart illustrates January temperature patterns in Dover, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Dover, January typically has an average temperature of 4°C (40°F), with highs reaching up to 21°C (70°F) and lows dropping to around -17°C (2°F).

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

January Precipitation in Dover

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

January Precipitation Trends in Dover

The chart displays monthly precipitation patterns in Dover, 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 Dover, January typically receives around 100 mm (3.9 inches) of precipitation spread over approximately 10 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Dover

In Dover in January humidity is 86%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and travel cumbersome as you navigate through a thick, heavy air that clings to your skin.

January Average Humidity in Dover

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

In Dover 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 Dover, you can check the information here.

Maximum UV Index Levels in Dover for January

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

Data source: Dover 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 Dover Compares to Other Months

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

This table compares monthly weather conditions in Dover, 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 (40°F)	100 mm (3.9 inches)	86%	moderate
February Weather	6°C (43°F)	166 mm (6.5 inches)	84%	high
March Weather	11°C (52°F)	152 mm (6.0 inches)	84%	high
April Weather	15°C (59°F)	154 mm (6.0 inches)	80%	very high
May Weather	21°C (70°F)	127 mm (5.0 inches)	82%	very high
June Weather	25°C (77°F)	107 mm (4.2 inches)	83%	extreme
July Weather	27°C (81°F)	105 mm (4.1 inches)	79%	extreme
August Weather	26°C (79°F)	111 mm (4.4 inches)	76%	very high
September Weather	23°C (74°F)	109 mm (4.3 inches)	75%	very high
October Weather	17°C (63°F)	121 mm (4.8 inches)	74%	high
November Weather	9°C (48°F)	94 mm (3.7 inches)	85%	moderate
December Weather	7°C (45°F)	126 mm (4.9 inches)	88%	moderate