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December Weather in Dover, United States

Last updated: June 24, 2025

In Dover, United States, the average temperature in December is a pleasant 18°C (65°F). Expect a minimum of 2°C (36°F) and a maximum of 29°C (85°F), creating a delightful range for the month. However, don’t forget your umbrella, as 62 mm (2.4 in) of precipitation is likely over 6 days. With an average humidity of 84%, it’s sure to feel refreshingly lush!

December Temperature in Dover

In December in Dover, the average temperature is 18°C (65°F). Maximum temperatures can reach 29°C (85°F), while minimum temperatures can drop to as low as 2°C (36°F). This makes Dover an ideal destination for travelers seeking a pleasant climate with a mix of warm days and cooler evenings.

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 18°C (65°F), with highs reaching up to 29°C (85°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec616769747881828281786964
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 62 mm (2.4 in), spread over the course of 6 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 62 mm (2.4 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec41641865124206243223175674562
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 84%. With an average temperature of 18°C (65°F), this humidity feels like a thick blanket enveloping you, making travel feel heavy and slightly uncomfortable as the air clings to your skin and limits your breath.

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.
JanFebMarAprMayJunJulAugSepOctNovDec83%80%75%68%65%73%77%80%83%83%83%84%
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 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the 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 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec6810111112121111975
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 Weather16°C (62°F)41 mm (1.6 inches)83%high
February Weather20°C (67°F)64 mm (2.5 inches)80%very high
March Weather20°C (69°F)18 mm (0.7 inches)75%very high
April Weather23°C (74°F)65 mm (2.6 inches)68%extreme
May Weather26°C (78°F)124 mm (4.9 inches)65%extreme
June Weather27°C (81°F)206 mm (8.1 inches)73%extreme
July Weather28°C (82°F)243 mm (9.6 inches)77%extreme
August Weather28°C (82°F)223 mm (8.8 inches)80%extreme
September Weather27°C (81°F)175 mm (6.9 inches)83%extreme
October Weather25°C (78°F)67 mm (2.6 inches)83%very high
November Weather20°C (69°F)45 mm (1.8 inches)83%high
December Weather18°C (65°F)62 mm (2.4 inches)84%moderate

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