December weather forecast
Seaford, DE

Weather in December

December, the first month of the winter in Seaford, is still a chilly month, with temperature in the range of an average high of 47.5°F (8.6°C) and an average low of 36°F (2.2°C).

Temperature

In Seaford, the average high-temperature in December marginally drops from a mild 55.4°F (13°C) in November to a frosty 47.5°F (8.6°C). The average low-temperature, in Seaford, is 36°F (2.2°C).

Humidity

In Seaford, the average relative humidity in December is 78%.

Rainfall

In December, in Seaford, Delaware, the rain falls for 6 days. Throughout December, 0.59" (15mm) of precipitation is accumulated. Throughout the year, there are 95.8 rainfall days, and 8.03" (204mm) of precipitation is accumulated.

Snowfall

January through March, November and December are months with snowfall. In Seaford, in December, snow falls for 0.9 days, with typically accumulated 0.12" (3mm) of snow. In Seaford, during the entire year, snow falls for 5.6 days and aggregates up to 0.94" (24mm) of snow.

Daylight

December has the shortest days of the year in Seaford, with an average of 9h and 31min of daylight.
On the first day of the month, sunrise is at 7:01 am and sunset at 4:41 pm. On the last day of December, sunrise is at 7:20 am and sunset at 4:50 pm EST.

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 unsafe exposure to UV radiation for ordinary individuals.
Note: The average daily UV index of 2 in December transform into the following instructions:
People with sensitive skin, children, and babies should always be protected from prolonged 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 Seaford?

In December, in Seaford, the average high-temperature is 47.5°F (8.6°C), and the average low-temperature is 36°F (2.2°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which represents the influence of relative humidity on air temperature, in August is estimated at 89.6°F (32°C).

What is the average humidity in December in Seaford?

In Seaford, Delaware, the average relative humidity in December is 78%.

How much does it rain in Seaford in December?

In Seaford, in December, during 6 rainfall days, 0.59" (15mm) of precipitation is typically accumulated.

How much does it snow in Seaford in December?

In Seaford, in December, snow falls for 0.9 days, with typically accumulated 0.12" (3mm) of snow.

What is the month with the shortest days in Seaford?

December has the shortest days of the year, with an average of 9h and 31min of daylight.

How many hours of daylight does Seaford have in December?

The average day length in December in Seaford is 9h and 31min.

When is the sunrise / sunset in December in Seaford?

In December, on the first day of the month, sunrise is at 7:01 am and sunset at 4:41 pm. On the last day of the month, in Seaford, Delaware, sunrise is at 7:20 am and sunset at 4:50 pm EST.

How long on average sun shines in December in Seaford?

The average sunshine duration in December is 5.2h.

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

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

How high is the UV index in December in Seaford?

The average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Seaford, DE

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

The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (41.5°F).

  • Average low temperature in December: 36°F

The month with the highest average low temperature is July (69.8°F).
The coldest month (with the lowest average low temperature) is January (29.1°F).

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Average pressure in December
Seaford, DE

Average pressure in December - Seaford, DE
  • Average pressure in December: 30.1"Hg

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

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Average wind speed in December
Seaford, DE

Average wind speed in December - Seaford, DE
  • Average wind speed in December: 8.6mph

The windiest month (with the highest average wind speed) is February (9.7mph).
The calmest month (with the lowest average wind speed) is August (6mph).

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Average humidity in December
Seaford, DE

Average humidity in December - Seaford, DE
  • Average humidity in December: 78%

The months with the highest relative humidity are May, August and September (80%).
The month with the lowest relative humidity is January (74%).

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Average rainfall in December
Seaford, DE

Average rainfall in December - Seaford, DE
  • Average rainfall in December: 0.59"

The wettest months (with the highest rainfall) are July and August (1.06").
The driest month (with the least rainfall) is September (0.39").

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Average rainfall days in December
Seaford, DE

Average rainfall days in December - Seaford, DE
  • Average rainfall days in December: 6 days

The month with the highest number of rainy days is July (12 days).
The month with the least rainy days is November (4.9 days).

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Average snowfall in December
Seaford, DE

Average snowfall in December - Seaford, DE
  • Average snowfall in December: 0.12"

The month with the highest snowfall is January (0.35").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in December
Seaford, DE

Average snowfall days in December - Seaford, DE
  • Average snowfall days in December: 0.9 days

The month with the highest number of snowfall days is January (2 days).
The 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
Seaford, DE

Average daylight in December / Average sunshine in December - Seaford, DE
  • Average daylight in December: 9h and 31min

The month with the longest days is June (Average daylight: 14h and 49min).
The month with the shortest days is December (Average daylight: 9h and 31min).

  • Average sunshine in December: 5h and 12min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).

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Average sunshine days in December
Seaford, DE

Average sunshine days in December - Seaford, DE
  • Average sunshine days in December: 23.8 days

The month with the most sunshine days is November (23.9 days).
The month with the least sunshine days is July (15.7 days).

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Average UV index in December
Seaford, DE

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

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

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Average cloud cover in December
Seaford, DE

Average cloud cover in December - Seaford, DE
  • Average cloud cover in December: 44

The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 28).

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Average visibility in December
Seaford, DE

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

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

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