January Weather in Dover, United States

Last updated: June 24, 2025

In Dover, United States, the average temperature in January hovers around -8°C (18°F). However, the month can bring extreme variations, with minimums plunging to -34°C (-29°F) and maximums reaching a mild 9°C (48°F). Expect some moisture, as precipitation averages 36 mm (1.4 in) over 6 days, coupled with a high average humidity of 84%.

January Temperature in Dover

In January in Dover, the average temperature is -8°C (18°F), with maximums reaching 9°C (48°F) and minimums dropping as low as -34°C (-29°F). Travelers should be prepared for extremely cold conditions and pack accordingly.

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 -8°C (18°F), with highs reaching up to 9°C (48°F) and lows dropping to around -34°C (-29°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 total precipitation amount is 36 mm (1.4 in), which falls over the course of 6 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 36 mm (1.4 inches) of precipitation spread over approximately 6 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 84%. With an average temperature of -8°C (18°F), this humidity feels like a biting chill that seeps into your bones, making outdoor exploration challenging and requiring extra layers for comfort.

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 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 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	-8°C (18°F)	36 mm (1.4 inches)	84%	moderate
February Weather	-8°C (19°F)	47 mm (1.9 inches)	85%	moderate
March Weather	1°C (34°F)	58 mm (2.3 inches)	84%	moderate
April Weather	6°C (44°F)	87 mm (3.4 inches)	83%	very high
May Weather	15°C (59°F)	145 mm (5.7 inches)	75%	very high
June Weather	21°C (71°F)	139 mm (5.5 inches)	79%	very high
July Weather	23°C (73°F)	99 mm (3.9 inches)	75%	very high
August Weather	21°C (70°F)	122 mm (4.8 inches)	69%	very high
September Weather	18°C (64°F)	121 mm (4.8 inches)	74%	very high
October Weather	9°C (48°F)	113 mm (4.5 inches)	79%	moderate
November Weather	1°C (34°F)	49 mm (1.9 inches)	88%	moderate
December Weather	-4°C (25°F)	42 mm (1.7 inches)	82%	low