December weather forecast and climate
Millsboro, DE

Weather in December

The first month of the winter, December, is also a frosty month in Millsboro, Delaware, with average temperature ranging between max 47.5°F (8.6°C) and min 37.8°F (3.2°C).

Temperature

In Millsboro, Delaware, the average high-temperature marginally drops, from a cool 54.9°F (12.7°C) in November, to a frosty 47.5°F (8.6°C). In December, the average low-temperature is 37.8°F (3.2°C).

Humidity

The average relative humidity in Millsboro is 76%.

Rainfall

In Millsboro, in December, during 9.7 rainfall days, 1.69" (43mm) of precipitation is typically accumulated. In Millsboro, during the entire year, the rain falls for 146.8 days and collects up to 25.2" (640mm) of precipitation.

Snowfall

January through March, November and December are months with snowfall in Millsboro, Delaware. In Millsboro, Delaware, snow falls for 1.9 days, with typically accumulated 0.43" (11mm) of snow. Throughout the year, there are 9.4 snowfall days, and 3.39" (86mm) of snow is accumulated.

Daylight

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

Sunshine

In Millsboro, Delaware, the average sunshine in December is 5.2h.

UV index

January and December, with an average maximum UV index of 2, are months with the lowest UV index in Millsboro. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 2 in December interpret into the following advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in December in Millsboro?

The average high-temperature, in December, is 47.5°F (8.6°C), while the average low-temperature is 37.8°F (3.2°C).

What is the average humidity in December in Millsboro?

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

How many days does it rain in December in Millsboro?

In Millsboro, during December, the rain falls for 9.7 days and regularly aggregates up to 1.69" (43mm) of precipitation.

How much does it snow in Millsboro in December?

In Millsboro, Delaware, in December, snow falls for 1.9 days, with typically accumulated 0.43" (11mm) of snow.

What is the month with the shortest days in Millsboro?

The month with the shortest days in Millsboro is December, with an average of 9.5h of daylight.

How many hours of daylight does Millsboro have in December?

In Millsboro, Delaware, the average length of the day in December is 9.5h.

How many hours of sunshine does Millsboro have in December?

In Millsboro, Delaware, the average sunshine in December is 5.2h.

When is the lowest UV index in Millsboro?

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

What is the UV index reading in December in Millsboro?

The average daily maximum UV index in December in Millsboro is 2. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to the Sun's UV rays.

Average temperature in December
Millsboro, DE

Average temperature in December - Millsboro, DE
  • Average high temperature in December: 47.5°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (41.7°F).

  • Average low temperature in December: 37.8°F

The month with the highest average low temperature is July (71.6°F).
The coldest month (with the lowest average low temperature) is January (31.5°F).

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Average pressure in December
Millsboro, DE

Average pressure in December - Millsboro, 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
Millsboro, DE

Average wind speed in December - Millsboro, DE
  • Average wind speed in December: 10.5mph

The windiest months (with the highest average wind speed) are January, February and March (11.1mph).
The calmest month (with the lowest average wind speed) is August (7.3mph).

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Average humidity in December
Millsboro, DE

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

The month with the highest relative humidity is May (81%).
Months with the lowest relative humidity are January and November (74%).

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Average rainfall in December
Millsboro, DE

Average rainfall in December - Millsboro, DE
  • Average rainfall in December: 1.69"

The wettest months (with the highest rainfall) are July and August (2.95").
The driest month (with the least rainfall) is January (1.46").

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Average rainfall days in December
Millsboro, DE

Average rainfall days in December - Millsboro, DE
  • Average rainfall days in December: 9.7 days

The month with the highest number of rainy days is July (16.7 days).
The month with the least rainy days is January (7.4 days).

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Average snowfall in December
Millsboro, DE

Average snowfall in December - Millsboro, DE
  • Average snowfall in December: 0.43"

The month with the highest snowfall is January (1.22").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in December
Millsboro, DE

Average snowfall days in December - Millsboro, DE
  • Average snowfall days in December: 1.9 days

The month with the highest number of snowfall days is January (3.1 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

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

The month with the longest days is June (Average daylight: 14.8h).
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: 11h).
The month with the least sunshine is February (Average sunshine: 5.1h).

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Average sunshine days in December
Millsboro, DE

Average sunshine days in December - Millsboro, DE
  • Average sunshine days in December: 18.9 days

The month with the most sunshine days is January (20.1 days).
The month with the least sunshine days is July (12.2 days).

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Average UV index in December
Millsboro, DE

Average UV index in December - Millsboro, 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
Millsboro, DE

Average cloud cover in December - Millsboro, DE
  • Average cloud cover in December: 43

The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 26).

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Average visibility in December
Millsboro, DE

Average visibility in December - Millsboro, 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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