December weather forecast and climate
Smyrna, DE

December, the first month of the winter, in Smyrna, is also a frosty month, with temperature in the range of an average high of 45.9°F (7.7°C) and an average low of 34.7°F (1.5°C).

Temperature

In December, the average high-temperature marginally drops, from a cool 54°F (12.2°C) in November, to a chilly 45.9°F (7.7°C). In December, in Smyrna, the average low-temperature is 34.7°F (1.5°C).

Humidity

In Smyrna, the average relative humidity in December is 77%.

Rainfall

In December, in Smyrna, Delaware, the rain falls for 11.5 days. Throughout December, 3.43" (87mm) of precipitation is accumulated. In Smyrna, during the entire year, the rain falls for 169.2 days and collects up to 34.96" (888mm) of precipitation.

Snowfall

Months with snowfall are January through April, November and December. In Smyrna, Delaware, during December, snow falls for 2.5 days and regularly aggregates up to 0.91" (23mm) of snow. In Smyrna, Delaware, during the entire year, snow falls for 14.4 days, and aggregates up to 7.44" (189mm) of snow.

Daylight

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

Sunshine

In December, the average sunshine in Smyrna 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 estimate of 2, and below, represents a minimal health vulnerability from the exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 2 transform into the following instructions:
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.

What is the temperature in December in Smyrna?

In December, in Smyrna, the average high-temperature is 45.9°F (7.7°C), and the average low-temperature is 34.7°F (1.5°C).

What is the average humidity in December in Smyrna?

In Smyrna, Delaware, the average relative humidity in December is 77%.

How much does it rain in Smyrna in December?

In December, in Smyrna, Delaware, the rain falls for 11.5 days. Throughout December, 3.43" (87mm) of precipitation is accumulated.

How many days does it snow in December in Smyrna?

In Smyrna, Delaware, in December, snow falls for 2.5 days, with typically accumulated 0.91" (23mm) of snow.

What is the month with the shortest days in Smyrna?

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

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

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

How long on average sun shines in December in Smyrna?

The average sunshine in December in Smyrna is 5.2h.

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

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

What is the UV index intensity in December in Smyrna?

In Smyrna, Delaware, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV radiation.
Average temperature in December - Smyrna, DE
  • Average high temperature in December: 45.9°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 (39.2°F).

  • Average low temperature in December: 34.7°F

The month with the highest average low temperature is July (69.3°F).
The coldest month (with the lowest average low temperature) is January (27.9°F).

Average pressure in December - Smyrna, 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").

Average wind speed in December - Smyrna, DE
  • Average wind speed in December: 8.7mph

The windiest months (with the highest average wind speed) are February and March (9.5mph).
The calmest month (with the lowest average wind speed) is August (6mph).

Average humidity in December - Smyrna, DE
  • Average humidity in December: 77%

The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is April (73%).

Average rainfall in December - Smyrna, DE
  • Average rainfall in December: 3.43"

The wettest month (with the highest rainfall) is August (3.86").
The driest month (with the least rainfall) is January (2.13").

Average rainfall days in December - Smyrna, DE
  • Average rainfall days in December: 11.5 days

The month with the highest number of rainy days is July (19 days).
The month with the least rainy days is November (9.3 days).

Average snowfall in December - Smyrna, DE
  • Average snowfall in December: 0.91"

The month with the highest snowfall is March (2.6").
Months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December - Smyrna, DE
  • Average snowfall days in December: 2.5 days

The month with the highest number of snowfall days is January (4.5 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in December: 5.2h

The month with the most sunshine is July (Average sunshine: 10.7h).
The month with the least sunshine is February (Average sunshine: 5.1h).

Average sunshine days in December - Smyrna, DE
  • Average sunshine days in December: 16.8 days

The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (9.5 days).

Average UV index in December - Smyrna, 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).

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

Months with the most cloud cover are February and March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 29).

Average visibility in December - Smyrna, 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).