December weather forecast and climate
Yorklyn, DE

Weather in December

December, the first month of the winter, in Yorklyn, is also a frosty month, with average temperature varying between 31.8°F (-0.1°C) and 43°F (6.1°C).

Temperature

In Yorklyn, the average high-temperature in December drops, from a cool 52°F (11.1°C) in November, to a chilly 43°F (6.1°C). The average low-temperature, in Yorklyn, is 31.8°F (-0.1°C).

Humidity

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

Rainfall

In December, the rain falls for 9.4 days. Throughout December, 1.54" (39mm) of precipitation is accumulated. In Yorklyn, during the entire year, the rain falls for 135 days and collects up to 17.76" (451mm) of precipitation.

Snowfall

Months with snowfall are January through May, November and December. In Yorklyn, during December, snow falls for 2.4 days and regularly aggregates up to 0.79" (20mm) of snow. Throughout the year, there are 16.6 snowfall days, and 5.47" (139mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9.4h of daylight.

Sunshine

In December, the average sunshine in Yorklyn is 5h.

UV index

Months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 2 interpret into the following advice:
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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. 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 Yorklyn?

In Yorklyn, in December, the average high-temperature is 43°F (6.1°C), and the average low-temperature is 31.8°F (-0.1°C).

What is the average humidity in December in Yorklyn?

The average relative humidity in December in Yorklyn is 78%.

How many days does it rain in December in Yorklyn?

In Yorklyn, Delaware, in December, it is raining for 9.4 days, with typically 1.54" (39mm) of accumulated precipitation.

How many days does it snow in December in Yorklyn?

In December, in Yorklyn, it is snowing for 2.4 days. Throughout December, 0.79" (20mm) of snow is accumulated.

What is the month with the shortest days in Yorklyn?

With an average of 9.4h of daylight, December has the shortest days of the year in Yorklyn, Delaware.

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

In December, the average length of the day is 9.4h.

How long on average sun shines in December in Yorklyn?

The average sunshine in December in Yorklyn is 5h.

What are the months with the lowest UV index in Yorklyn?

Months with the lowest UV index in Yorklyn, Delaware, are January, February, November and December, with an average maximum UV index of 2.

What is the UV index intensity in December in Yorklyn?

In December, the average daily maximum UV index in Yorklyn, Delaware, is 2. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to the UV radiation.

Average temperature in December
Yorklyn, DE

Average temperature in December - Yorklyn, DE
  • Average high temperature in December: 43°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (36.9°F).

  • Average low temperature in December: 31.8°F

The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).

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Average pressure in December
Yorklyn, DE

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

The month with the highest atmospheric pressure is November (30.13").
The month with the lowest atmospheric pressure is June (29.94").

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Average wind speed in December
Yorklyn, DE

Average wind speed in December - Yorklyn, DE
  • Average wind speed in December: 8.1mph

The windiest months (with the highest average wind speed) are January, February and March (8.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).

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Average humidity in December
Yorklyn, DE

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

The month with the highest relative humidity is October (79%).
The month with the lowest relative humidity is April (74%).

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Average rainfall in December
Yorklyn, DE

Average rainfall in December - Yorklyn, DE
  • Average rainfall in December: 1.54"

The wettest month (with the highest rainfall) is August (2.36").
The driest month (with the least rainfall) is November (1.06").

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Average rainfall days in December
Yorklyn, DE

Average rainfall days in December - Yorklyn, DE
  • Average rainfall days in December: 9.4 days

The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is January (6.6 days).

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Average snowfall in December
Yorklyn, DE

Average snowfall in December - Yorklyn, DE
  • Average snowfall in December: 0.79"

The month with the highest snowfall is March (1.5").
Months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in December
Yorklyn, DE

Average snowfall days in December - Yorklyn, DE
  • Average snowfall days in December: 2.4 days

The month with the highest number of snowfall days is January (5.2 days).
Months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Yorklyn, DE
  • Average daylight in December: 9.4h

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in December: 5h

The month with the most sunshine is July (Average sunshine: 10.7h).
The month with the least sunshine is February (Average sunshine: 4.8h).

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Average sunshine days in December
Yorklyn, DE

Average sunshine days in December - Yorklyn, DE
  • Average sunshine days in December: 19.5 days

The month with the most sunshine days is November (21 days).
The month with the least sunshine days is July (12.8 days).

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Average UV index in December
Yorklyn, DE

Average UV index in December - Yorklyn, 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, February, November and December (UV index 2).

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Average cloud cover in December
Yorklyn, DE

Average cloud cover in December - Yorklyn, DE
  • Average cloud cover in December: 46

Months with the most cloud cover are February, March and May (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).

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Average visibility in December
Yorklyn, DE

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

Months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
Months with the lowest visibility are May and September (5mi).

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