January Weather in Dover, United States

Last updated: June 24, 2025

In January, the average temperature in Dover, United States hovers around 4°C (40°F). Expect chilly days, with minimum temperatures dipping to -15°C (4°F) and maximizing at 20°C (69°F). Additionally, the area experiences 99 mm (3.9 in) of precipitation over about 9 days, contributing to an average humidity of 82%. Be prepared for a mix of cool weather and occasional rain!

January Temperature in Dover

In January in Dover, the average temperature is 4°C (40°F). Maximums can reach 20°C (68°F) and minimums can be as low as -15°C (5°F). Be prepared for a wide range of temperatures and pack accordingly to ensure a comfortable trip.

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 20°C (69°F) and lows dropping to around -15°C (4°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 99 mm (3.9 in) during a span of 9 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 99 mm (3.9 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 Dover

In Dover in January, humidity is 82%. With an average temperature of 4°C (40°F), this humidity feels like a chilly dampness that lingers in the air, making travel slightly uncomfortable as the cold penetrates through layers of clothing, often leaving you feeling chilled and clammy.

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 82%, 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 reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Dover for better planning.

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 4, 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)	99 mm (3.9 inches)	82%	moderate
February Weather	6°C (43°F)	144 mm (5.7 inches)	79%	high
March Weather	11°C (53°F)	155 mm (6.1 inches)	77%	very high
April Weather	14°C (58°F)	147 mm (5.8 inches)	78%	very high
May Weather	20°C (68°F)	209 mm (8.2 inches)	82%	extreme
June Weather	24°C (76°F)	116 mm (4.6 inches)	81%	extreme
July Weather	27°C (80°F)	80 mm (3.2 inches)	75%	extreme
August Weather	25°C (78°F)	110 mm (4.3 inches)	61%	very high
September Weather	23°C (74°F)	72 mm (2.8 inches)	59%	very high
October Weather	16°C (62°F)	105 mm (4.1 inches)	69%	high
November Weather	9°C (49°F)	97 mm (3.8 inches)	82%	moderate
December Weather	7°C (45°F)	113 mm (4.5 inches)	87%	moderate