December weather forecast
Dunellen, NJ

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Weather in December

December, the first month of the winter in Dunellen, is also a wintry month, with an average temperature fluctuating between 41.9°F (5.5°C) and 30.7°F (-0.7°C).

Temperature

Observing a mild shift, the average high-temperature during December reduces from November's fresh 50.9°F (10.5°C) to a wintry 41.9°F (5.5°C). In Dunellen, December is marked by an average low-temperature of 30.7°F (-0.7°C).

Humidity

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

Rainfall

The month with the most rainfall in Dunellen is December, when the rain falls for 10.5 days and typically aggregates up to 3.31" (84mm) of precipitation.

Snowfall

Months with snowfall in Dunellen are January through May, October through December. In Dunellen, during December, snow falls for 4.3 days and regularly aggregates up to 2.13" (54mm) of snow. In Dunellen, New Jersey, during the entire year, snow falls for 26.7 days and aggregates up to 12.68" (322mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9h and 18min of daylight.
On the first day of December in Dunellen, New Jersey, sunrise is at 7:02 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:41 pm EST.

Sunshine

The average sunshine in December in Dunellen is 4.8h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Dunellen. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
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Frequently asked questions

Is it cold in Dunellen during December?

The high-temperature, in December, in Dunellen, records 41.9°F (5.5°C), while the low-temperature is 30.7°F (-0.7°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in August is calculated to be 87.8°F (31°C).

What is the average humidity in December in Dunellen?

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

What is the rainiest month in Dunellen?

December is the month with the most rainfall in Dunellen. Rain falls for 10.5 days and accumulates 3.31" (84mm) of precipitation.

How many days does it rain in December in Dunellen?

In December, in Dunellen, New Jersey, the rain falls for 10.5 days. Throughout December, 3.31" (84mm) of precipitation is accumulated.

How many days does it snow in December in Dunellen?

In Dunellen, during December, snow falls for 4.3 days and regularly aggregates up to 2.13" (54mm) of snow.

What is the month with the shortest days in Dunellen?

With an average of 9h and 18min of daylight, December has the shortest days of the year in Dunellen.

How many hours of daylight does Dunellen have in December?

In December, the average day length in Dunellen is 9h and 20min.

What time are sunrise and sunset in December in Dunellen?

In December, on the first day of the month, sunrise is at 7:02 am and sunset at 4:31 pm. On the last day of the month, in Dunellen, New Jersey, sunrise is at 7:21 am and sunset at 4:41 pm EST.

How many hours of sunshine does Dunellen have in December?

In Dunellen, New Jersey, the average sunshine duration in December is 4.8h.

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

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Dunellen.

How high is the UV index in December in Dunellen?

In Dunellen, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a low health threat 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
Dunellen, NJ

Average temperature in December - Dunellen, NJ
  • Average high temperature in December: 41.9°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 (35.6°F).

  • Average low temperature in December: 30.7°F

The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).

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Average pressure in December
Dunellen, NJ

Average pressure in December - Dunellen, NJ
  • Average pressure in December: 30.08"Hg

The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in December
Dunellen, NJ

Average wind speed in December - Dunellen, NJ
  • Average wind speed in December: 7.8mph

The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).

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Average humidity in December
Dunellen, NJ

Average humidity in December - Dunellen, NJ
  • Average humidity in December: 78%

The month with the highest relative humidity is February (79%).
The months with the lowest relative humidity are April and August (73%).

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Average rainfall in December
Dunellen, NJ

Average rainfall in December - Dunellen, NJ
  • Average rainfall in December: 3.31"

The wettest month (with the highest rainfall) is December (3.31").
The driest month (with the least rainfall) is September (1.57").

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Average rainfall days in December
Dunellen, NJ

Average rainfall days in December - Dunellen, NJ
  • Average rainfall days in December: 10.5 days

The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (8.4 days).

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Average snowfall in December
Dunellen, NJ

Average snowfall in December - Dunellen, NJ
  • Average snowfall in December: 2.13"

The month with the highest snowfall is March (4.06").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Dunellen, NJ

Average snowfall days in December - Dunellen, NJ
  • Average snowfall days in December: 4.3 days

The month with the highest number of snowfall days is January (7.8 days).
The 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
Dunellen, NJ

Average daylight in December / Average sunshine in December - Dunellen, NJ
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in December: 4h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days in December
Dunellen, NJ

Average sunshine days in December - Dunellen, NJ
  • Average sunshine days in December: 16.8 days

The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is May (11.6 days).

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Average UV index in December
Dunellen, NJ

Average UV index in December - Dunellen, NJ
  • Average UV index in December: 2

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

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Average cloud cover in December
Dunellen, NJ

Average cloud cover in December - Dunellen, NJ
  • Average cloud cover in December: 49

The months with the most cloud cover are February, March and December (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 34).

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Average visibility in December
Dunellen, NJ

Average visibility in December - Dunellen, NJ
  • Average visibility in December: 6mi

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

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Dunellen, New Jersey, USA

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