Newark
New Jersey, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
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
December, the first month of the winter, in Newark, is still a chilly month, with average temperature ranging between min 29.7°F (-1.3°C) and max 43.5°F (6.4°C).

Temperature

In December, the average high-temperature drops, from a cool 54.7°F (12.6°C) in November, to a frosty 43.5°F (6.4°C). In Newark, in December, the average low-temperature is 29.7°F (-1.3°C).

Rainfall

In Newark, in December, it is raining for 10.6 days, with typically 3.8" (96.5mm) of accumulated precipitation. Throughout the year, there are 122.2 rainfall days, and 46.2" (1174.3mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, November and December.

Ocean temperature

In December, the average ocean temperature in Newark, New Jersey, 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.

Daylight

The month with the shortest days is December, with an average of 9.3h of daylight.

Sunshine

The month with the least sunshine is December, with an average of 4h of sunshine.

UV index

December is the month with the lowest UV index in Newark, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low health risk from the exposure to the Sun's UV rays for ordinary individuals.
In December, the average maximum UV index of 1 translate into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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 Newark?

In December, in Newark, New Jersey, the average high-temperature is 43.5°F (6.4°C), and the average low-temperature is 29.7°F (-1.3°C).

How much does it rain in Newark in December?

In Newark, New Jersey, in December, during 10.6 rainfall days, 3.8" (96.5mm) of precipitation is typically accumulated.

How much does it snow in Newark in December?

In Newark, in December, snow falls for 2.9 days, with typically accumulated 5.4" (137.2mm) of snow.

What is the ocean temperature in December in Newark?

In Newark, the average seawater temperature in December is 47.1°F (8.4°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

What is the month with the shortest days in Newark?

December has the shortest days of the year in Newark, New Jersey, with an average of 9.3h of daylight.

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

In December, the average length of the day in Newark, New Jersey, is 9.3h.

What is the month with the least sunshine in Newark?

With an average of 4h of sunshine, December has the least sunshine of the year in Newark.

How many hours of sunshine does Newark have in December?

In Newark, the average sunshine in December is 4h.

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

December is the month with the lowest UV index, with an average maximum UV index of 1.

How high is the UV index in December in Newark?

In December, the average daily maximum UV index in Newark is 1. A UV Index estimate of 2, and below, represents a low health threat from unprotected exposure to the UV radiation.
Average temperature in December - Newark, NJ
  • Average high temperature in December: 43.5°F

The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (38.8°F).

  • Average low temperature in December: 29.6°F

The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (24.5°F).

Average rainfall in December - Newark, NJ
  • Average rainfall in December: 3.8"

The wettest month (with the highest rainfall) is July (4.8").
The driest month (with the lowest rainfall) is February (2.9").

Average rainfall days in December - Newark, NJ
  • Average rainfall days in December: 10.6 days

The month with the highest number of rainy days is April (11.5 days).
The month with the lowest number of rainy days is September (8.6 days).

Average snowfall in December - Newark, NJ
  • Average snowfall in December: 5.4"

The month with the highest snowfall is February (9.5").
Months with the lowest snowfall are May, June, July, August, September and October (0").

Average snowfall days in December - Newark, NJ
  • Average snowfall days in December: 2.9 days

The month with the highest number of snowfall days is January (5 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

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).

Average daylight in December / Average sunshine in December - Newark, NJ
  • Average daylight in December: 9.3h

The month with the longest days is June (Average daylight: 15.1h).
The month with shortest days is December (Average daylight: 9.3h).

  • Average sunshine in December: 4h

Months with most sunshine are June and July (Average sunshine: 9h).
The month with least sunshine is December (Average sunshine: 4h).

Average UV index in December - Newark, NJ
  • Average UV index in December: 1

Months with the highest UV index are June, July and August (UV index 8).
The month with the lowest UV index is December (UV index 1).