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December Weather in Dover, United States

Last updated: June 24, 2025

In December, the average temperature in Dover, United States hovers around 7°C (45°F), with a range that can dip as low as -9°C (16°F) and peak at a pleasant 24°C (76°F). Expect about 113 mm (4.5 in) of precipitation over 9 days, accompanied by a high average humidity of 87%. Prepare for a mix of cool and mild weather as you explore!

December Temperature in Dover

In December in Dover, the average temperature is 7°C (45°F). The maximum can reach 24°C (76°F), while the minimum can drop as low as -9°C (16°F). It's advisable to pack layers to stay comfortable during your travels.

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 24°C (76°F) and lows dropping to around -9°C (16°F).
JanFebMarAprMayJunJulAugSepOctNovDec394252586876807874624945
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 113 mm (4.5 in) over a span of 9 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 113 mm (4.5 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec99144155147209116801117210597113
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 87%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill that seeps into your bones, making outdoor adventures somewhat uncomfortable and urging travelers to seek refuge in cozy cafes or warm indoor activities.

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 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%79%77%78%82%81%75%61%59%69%82%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 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 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 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111109754
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)99 mm (3.9 inches)82%moderate
February Weather6°C (43°F)144 mm (5.7 inches)79%high
March Weather11°C (53°F)155 mm (6.1 inches)77%very high
April Weather14°C (58°F)147 mm (5.8 inches)78%very high
May Weather20°C (68°F)209 mm (8.2 inches)82%extreme
June Weather24°C (76°F)116 mm (4.6 inches)81%extreme
July Weather27°C (80°F)80 mm (3.2 inches)75%extreme
August Weather25°C (78°F)110 mm (4.3 inches)61%very high
September Weather23°C (74°F)72 mm (2.8 inches)59%very high
October Weather16°C (62°F)105 mm (4.1 inches)69%high
November Weather9°C (49°F)97 mm (3.8 inches)82%moderate
December Weather7°C (45°F)113 mm (4.5 inches)87%moderate

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