December weather forecast and climate
Dover, DE

The public Archives building in Dover, Delaware, between two large trees
The public Archives building in Dover, Delaware, between two large trees

Weather in December

December, the first month of the winter, in Dover, is also a frosty month, with temperature in the range of an average low of 35.6°F (2°C) and an average high of 46.2°F (7.9°C).

Temperature

In December, the average high-temperature marginally drops, from a fresh 54.3°F (12.4°C) in November, to a chilly 46.2°F (7.9°C). The average low-temperature, in December, is 35.6°F (2°C).

Humidity

In Dover, Delaware, the average relative humidity in December is 76%.

Rainfall

In Dover, in December, it is raining for 10.5 days, with typically 2.09" (53mm) of accumulated precipitation. Throughout the year, there are 152.3 rainfall days, and 26.3" (668mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Dover, Delaware, are January through March and December. December is the first month it typically snows. Throughout December, in the average 1.7 snowfall days, it receives 0.51" (13mm) of snow. In Dover, during the entire year, snow falls for 10.1 days, and aggregates up to 4.61" (117mm) of snow.

Daylight

With an average of 9.5h of daylight, December has the shortest days of the year.

Sunshine

In December, the average sunshine is 5.2h.

UV index

January and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low health risk from the exposure to the Sun's UV rays for the ordinary person.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in December in Dover?

The average high-temperature, in December, in Dover, is 46.2°F (7.9°C), while the average low-temperature is 35.6°F (2°C).

What is the average humidity in December in Dover?

In December, the average relative humidity in Dover is 76%.

How many days does it rain in December in Dover?

In Dover, in December, during 10.5 rainfall days, 2.09" (53mm) of precipitation is typically accumulated.

When does it start snowing in Dover?

December is the first month it typically snows in Dover, Delaware. Throughout December, in the average 1.7 snowfall days, it receives 0.51" (13mm) of snow.

What is the month with the shortest days in Dover?

December has the shortest days of the year in Dover, with an average of 9.5h of daylight.

What is the average length of the day in December in Dover?

The average length of the day in December in Dover is 9.5h.

How many hours of sunshine does Dover have in December?

In December, the average sunshine in Dover is 5.2h.

What is the month with the lowest UV index in Dover?

January and December, with an average maximum UV index of 2, are months with the lowest UV index in Dover, Delaware.

What is the UV index reading in December in Dover?

In December, the average daily maximum UV index in Dover is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from the exposure to the Sun's UV radiation.

Average temperature in December
Dover, DE

Average temperature in December - Dover, DE
  • Average high temperature in December: 46.2°F

The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (39.7°F).

  • Average low temperature in December: 35.6°F

The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (28.8°F).

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Average pressure in December
Dover, DE

Average pressure in December - Dover, DE
  • Average pressure in December: 30.1"

The month with the highest atmospheric pressure is November (30.12").
The month with the lowest atmospheric pressure is June (29.94").

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Average wind speed in December
Dover, DE

Average wind speed in December - Dover, DE
  • Average wind speed in December: 9.3mph

The windiest month (with the highest average wind speed) is February (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).

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Average humidity in December
Dover, DE

Average humidity in December - Dover, DE
  • Average humidity in December: 76%

The month with the highest relative humidity is May (79%).
Months with the lowest relative humidity are January, March, April and November (74%).

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Average rainfall in December
Dover, DE

Average rainfall in December - Dover, DE
  • Average rainfall in December: 2.09"

The wettest month (with the highest rainfall) is August (3.15").
The driest month (with the least rainfall) is January (1.46").

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Average rainfall days in December
Dover, DE

Average rainfall days in December - Dover, DE
  • Average rainfall days in December: 10.5 days

The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is November (8.1 days).

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Average snowfall in December
Dover, DE

Average snowfall in December - Dover, DE
  • Average snowfall in December: 0.51"

The month with the highest snowfall is January (1.65").
Months with the least snowfall are April, May, June, July, August, September, October and November (0").

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Average snowfall days in December
Dover, DE

Average snowfall days in December - Dover, DE
  • Average snowfall days in December: 1.7 days

The month with the highest number of snowfall days is January (3.5 days).
Months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

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Average daylight in December /
Average sunshine in December
Dover, DE

Average daylight in December / Average sunshine in December - Dover, DE
  • Average daylight in December: 9.5h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in December: 5.2h

The month with the most sunshine is July (Average sunshine: 10.8h).
The month with the least sunshine is February (Average sunshine: 5h).

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Average sunshine days in December
Dover, DE

Average sunshine days in December - Dover, DE
  • Average sunshine days in December: 18.4 days

The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is July (10.8 days).

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Average UV index in December
Dover, DE

Average UV index in December - Dover, DE
  • Average UV index in December: 2

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January and December (UV index 2).

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Average cloud cover in December
Dover, DE

Average cloud cover in December - Dover, DE
  • Average cloud cover in December: 45

The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 28).

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Average visibility in December
Dover, DE

Average visibility in December - Dover, DE
  • Average visibility in December: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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