January Weather in Dover, United States

Last updated: June 24, 2025

In Dover, United States, the average temperature in January hovers around -2°C (28°F). Be prepared for chilly days, as temperatures can plummet to a minimum of -21°C (-6°F). However, there's a chance of milder weather, with maximums reaching up to 17°C (62°F). During this month, expect approximately 77 mm (3.0 in) of precipitation over 8 days, and an average humidity level of 86%, making it a brisk yet invigorating time to visit!

January Temperature in Dover

In January in Dover, the average temperature is -2°C (28°F), with a maximum that can reach 17°C (62°F) and a minimum that can drop as low as -21°C (-6°F). Travelers should be prepared for a wide range of temperatures and dress in layers to stay comfortable during their visit.

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 -2°C (28°F), with highs reaching up to 17°C (62°F) and lows dropping to around -21°C (-6°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 77 mm (3.0 in) distributed over 8 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 77 mm (3.0 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 Dover

In Dover in January, humidity is 86%. With an average temperature of -2°C (28°F), this humidity feels like a dense fog wrapping around you, making it feel even colder and creating an uncomfortable chill that can dampen any plans for outdoor exploration.

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 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Dover, you can visit Hourly UV Index in Dover.

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 2, which falls under the low 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	-2°C (28°F)	77 mm (3.0 inches)	86%	low
February Weather	-1°C (30°F)	93 mm (3.7 inches)	84%	moderate
March Weather	2°C (36°F)	85 mm (3.4 inches)	82%	moderate
April Weather	8°C (46°F)	131 mm (5.1 inches)	80%	high
May Weather	14°C (57°F)	74 mm (2.9 inches)	72%	very high
June Weather	19°C (67°F)	84 mm (3.3 inches)	72%	very high
July Weather	22°C (72°F)	131 mm (5.2 inches)	67%	very high
August Weather	22°C (72°F)	77 mm (3.0 inches)	66%	very high
September Weather	18°C (65°F)	75 mm (2.9 inches)	71%	high
October Weather	12°C (54°F)	132 mm (5.2 inches)	78%	moderate
November Weather	5°C (41°F)	107 mm (4.2 inches)	84%	moderate
December Weather	0°C (32°F)	130 mm (5.1 inches)	81%	low