nomadseason

December Weather in Dover, United States

Last updated: June 24, 2025

In Dover, United States, the average temperature in December hovers around -3°C (27°F). During this time, temperatures can dip as low as -24°C (-11°F), while reaching a maximum of 14°C (58°F). Expect about 116 mm (4.6 in) of precipitation spread over 11 days, and with an average humidity of 84%, it's advisable to bundle up and prepare for wet conditions!

December Temperature in Dover

In December in Dover, the average temperature is -3°C (27°F). Maximum temperatures can reach 14°C (58°F), while minimums can drop as low as -24°C (-11°F). It's essential to pack warm clothing and be prepared for significant temperature fluctuations when traveling 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 -3°C (27°F), with highs reaching up to 14°C (58°F) and lows dropping to around -24°C (-11°F).
JanFebMarAprMayJunJulAugSepOctNovDec222531445565706861503627
Data source: Temperature data for Dover generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
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 116 mm (4.6 in) over the course of 11 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 116 mm (4.6 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec819780142105109164127105166106116
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Dover

In Dover in December humidity is 84%. With an average temperature of -3°C (27°F), this humidity feels like a heavy blanket that wraps around you, making travel uncomfortable and your breath visible in the cold 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 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%88%86%84%76%72%67%64%72%81%87%85%
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.
JanFebMarAprMayJunJulAugSepOctNovDec34681010997632
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 Weather-5°C (23°F)81 mm (3.2 inches)89%moderate
February Weather-4°C (25°F)97 mm (3.8 inches)88%moderate
March Weather0°C (32°F)80 mm (3.1 inches)86%high
April Weather6°C (44°F)142 mm (5.6 inches)84%very high
May Weather13°C (56°F)105 mm (4.1 inches)76%very high
June Weather18°C (65°F)109 mm (4.3 inches)72%very high
July Weather21°C (70°F)164 mm (6.5 inches)66%very high
August Weather20°C (68°F)127 mm (5.0 inches)64%very high
September Weather16°C (61°F)105 mm (4.1 inches)72%high
October Weather10°C (50°F)166 mm (6.5 inches)81%high
November Weather2°C (36°F)106 mm (4.2 inches)87%moderate
December Weather-3°C (27°F)116 mm (4.6 inches)84%low

Compare Dover's Climate with Cities Worldwide