December weather forecast
Newark, NJ

A mirrored reflection of Newark City in New Jersey, on the Passaic River
A mirrored reflection of Newark City in New Jersey, on the Passaic River

Weather in December

December, the first month of the winter in Newark, is also a wintry month, with temperature in the range of an average high of 42.1°F (5.6°C) and an average low of 32.9°F (0.5°C).

Temperature

In December, the average high-temperature drops from a cool 51.3°F (10.7°C) in November to a cold 42.1°F (5.6°C). In Newark, the average low-temperature is 32.9°F (0.5°C).

Humidity

February, May, October and December, with an average relative humidity of 76%, are the most humid months in Newark.

Rainfall

The months with the most rainfall are July and December, with an average 3.19" (81mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall. In Newark, during 3.6 snowfall days, 1.38" (35mm) of snow is typically accumulated. In Newark, New Jersey, during the entire year, snow falls for 20.9 days and aggregates up to 8.94" (227mm) of snow.

Ocean temperature

In Newark, the average water temperature is 47.1°F (8.4°C).
Note: Swimming in 47.1°F (8.4°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

December has the shortest days of the year, with an average of 9h and 19min of daylight.
On the first day of December in Newark, New Jersey, sunrise is at 7:01 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:38 pm EST.

Sunshine

In Newark, the average sunshine in December is 4.9h.

UV index

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
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. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What are the most humid months in Newark?

February, May, October and December, with an average relative humidity of 76%, are most humid months.

What is the average humidity in December in Newark?

The average relative humidity in December is 76%.

What is the rainiest month in Newark?

The months with the most rainfall are July and December, with an average 3.19" (81mm) of precipitation.

How many days does it rain in December in Newark?

In Newark, in December, it is raining for 11.9 days, with typically 3.19" (81mm) of accumulated precipitation.

How many days does it snow in December in Newark?

In December, in Newark, it is snowing for 3.6 days. Throughout December, 1.38" (35mm) of snow is accumulated.

What is the ocean temperature in December in Newark?

In Newark, in December, the average water temperature is 47.1°F (8.4°C). Swimming in 47.1°F (8.4°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the month with the shortest days in Newark?

The month with the shortest days is December, with an average of 9h and 19min of daylight.

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

The average day length in December in Newark, New Jersey, is 9h and 19min.

When are sunrise and sunset in December in Newark?

In December, on the first day of the month, sunrise is at 7:01 am and sunset at 4:30 pm. On the last day of the month, in Newark, sunrise is at 7:20 am and sunset at 4:38 pm EST.

How long on average sun shines in December in Newark?

The average sunshine duration in December in Newark is 4.9h.

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

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

How high is the UV index in December in Newark?

In Newark, New Jersey, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low health threat from unprotected exposure to 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
Newark, NJ

Average temperature in December - Newark, NJ
  • Average high temperature in December: 42.1°F

The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (36.3°F).

  • Average low temperature in December: 32.9°F

The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).

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Average pressure in December
Newark, NJ

Average pressure in December - Newark, 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
Newark, NJ

Average wind speed in December - Newark, NJ
  • Average wind speed in December: 9.2mph

The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest month (with the lowest average wind speed) is July (6.3mph).

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Average humidity in December
Newark, NJ

Average humidity in December - Newark, NJ
  • Average humidity in December: 76%

The months with the highest relative humidity are February, May, October and December (76%).
The months with the lowest relative humidity are April and August (72%).

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Average rainfall in December
Newark, NJ

Average rainfall in December - Newark, NJ
  • Average rainfall in December: 3.19"

The wettest months (with the highest rainfall) are July and December (3.19").
The driest month (with the least rainfall) is September (1.65").

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Average rainfall days in December
Newark, NJ

Average rainfall days in December - Newark, NJ
  • Average rainfall days in December: 11.9 days

The months with the highest number of rainy days are May and July (17.1 days).
The month with the least rainy days is November (9.5 days).

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Average snowfall in December
Newark, NJ

Average snowfall in December - Newark, NJ
  • Average snowfall in December: 1.38"

The month with the highest snowfall is March (3.46").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in December
Newark, NJ

Average snowfall days in December - Newark, NJ
  • Average snowfall days in December: 3.6 days

The month with the highest number of snowfall days is January (6.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature in December
Newark, NJ

Average sea temperature in December - Newark, NJ
  • Average sea temperature in December: 47.2°F

The best month for swimming (with the highest average sea temperature) is August (74.1°F).
The coldest month (with the lowest average sea temperature) is February (39.7°F).

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Average daylight in December /
Average sunshine in December
Newark, NJ

Average daylight in December / Average sunshine in December - Newark, NJ
  • Average daylight in December: 9h and 19min

The month with the longest days is June (Average daylight: 15h and 3min).
The month with the shortest days is December (Average daylight: 9h and 19min).

  • Average sunshine in December: 4h and 54min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

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Average sunshine days in December
Newark, NJ

Average sunshine days in December - Newark, NJ
  • Average sunshine days in December: 15.6 days

The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is June (11.4 days).

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Average UV index in December
Newark, NJ

Average UV index in December - Newark, 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
Newark, NJ

Average cloud cover in December - Newark, NJ
  • Average cloud cover in December: 47

The months with the most cloud cover are February, March and December (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 30).

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Average visibility in December
Newark, NJ

Average visibility in December - Newark, NJ
  • 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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