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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 1°C (33°F), with extreme lows dipping to -12°C (11°F) and highs reaching up to 13°C (56°F). Expect 145 mm (5.7 in) of precipitation spread over 20 days, contributing to a notably high average humidity of 96%. Stay prepared for a chilly, damp atmosphere!

December Temperature in Dover

In December in Dover, the average temperature is 1°C (33°F). Maximums can reach 13°C (56°F), and minimums can be as low as -12°C (11°F). Travelers should be prepared for cold weather and potential snowfall during this time.

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 1°C (33°F), with highs reaching up to 13°C (56°F) and lows dropping to around -12°C (11°F).
JanFebMarAprMayJunJulAugSepOctNovDec312836435360707161483933
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 145 mm (5.7 in) over a span of 20 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 145 mm (5.7 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec1181158983593682758106132145
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 96%. With an average temperature of 1°C (33°F), this humidity feels like an intense chill that seeps into your bones, making traveling quite uncomfortable and requiring you to bundle up while bracing against the dampness that lingers in the air.

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 96%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec95%93%91%88%83%80%82%71%71%85%90%96%
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 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 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 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec246789997432
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 Weather0°C (32°F)118 mm (4.6 inches)95%low
February Weather-2°C (29°F)115 mm (4.5 inches)93%moderate
March Weather2°C (36°F)89 mm (3.5 inches)91%high
April Weather6°C (43°F)83 mm (3.3 inches)88%high
May Weather11°C (53°F)59 mm (2.3 inches)83%very high
June Weather16°C (60°F)36 mm (1.4 inches)80%very high
July Weather21°C (70°F)8 mm (0.3 inches)82%very high
August Weather22°C (71°F)27 mm (1.1 inches)71%very high
September Weather16°C (61°F)58 mm (2.3 inches)71%high
October Weather9°C (48°F)106 mm (4.2 inches)85%moderate
November Weather4°C (39°F)132 mm (5.2 inches)90%moderate
December Weather1°C (33°F)145 mm (5.7 inches)96%low

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