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December Weather in Dover, United States

Last updated: June 24, 2025

In Dover, United States, the average temperature in December hovers around 7°C (45°F), with a minimum dipping to as low as -11°C (13°F) and a maximum reaching a pleasant 23°C (73°F). Expect 126 mm (4.9 in) of precipitation spread across 10 days, contributing to an average humidity level of a noteworthy 88%.

December Temperature in Dover

In December in Dover, the average temperature is 7°C (45°F). Maximums can reach 23°C (73°F) and minimums can be as low as -11°C (13°F). Be sure to pack layers to stay comfortable while exploring the diverse weather conditions.

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

The chart illustrates December 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, December typically has an average temperature of 7°C (45°F), with highs reaching up to 23°C (73°F) and lows dropping to around -11°C (13°F).
JanFebMarAprMayJunJulAugSepOctNovDec394352597077817874634845
Data source: Temperature data for Dover generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Dover

In Dover in December, the precipitation amount is 126 mm (4.9 in) distributed over a span of 10 days.

December Precipitation Trends in Dover

The chart displays monthly precipitation patterns in Dover, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Dover, December typically receives around 126 mm (4.9 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec10016615215412710810511110912194126
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Dover

In Dover in December humidity is 88%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable as you navigate through a heavy, thick atmosphere that clings to your skin.

December Average Humidity in Dover

This chart illustrates the average monthly humidity levels in Dover, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Dover is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%84%80%82%83%80%76%75%75%85%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Dover

In Dover in December, 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 December

The chart shows the monthly maximum UV Index (UVI) for Dover in December, 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 December, the maximum UV index in Dover typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710101111109753
Data source: Dover December 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 December 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 December’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 December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)100 mm (3.9 inches)86%moderate
February Weather6°C (43°F)166 mm (6.5 inches)84%high
March Weather11°C (52°F)152 mm (6.0 inches)84%high
April Weather15°C (59°F)154 mm (6.0 inches)80%very high
May Weather21°C (70°F)127 mm (5.0 inches)82%very high
June Weather25°C (77°F)107 mm (4.2 inches)83%extreme
July Weather27°C (81°F)105 mm (4.1 inches)79%extreme
August Weather26°C (79°F)111 mm (4.4 inches)76%very high
September Weather23°C (74°F)109 mm (4.3 inches)75%very high
October Weather17°C (63°F)121 mm (4.8 inches)74%high
November Weather9°C (48°F)94 mm (3.7 inches)85%moderate
December Weather7°C (45°F)126 mm (4.9 inches)88%moderate

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