December weather forecast and climate
New Brunswick, NJ

An aerial panorama of the city of Brunswick, New Jersey, seen with its deep tree cover, a large river, and bridges over the river
An aerial panorama of the city of Brunswick, New Jersey, seen with its deep tree cover, a large river, and bridges over the river

Weather in December

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

Temperature

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

Humidity

February, October and December, with an average relative humidity of 77%, are most humid months.

Rainfall

In New Brunswick, during 10.2 rainfall days, 2.83" (72mm) of precipitation is typically accumulated. Throughout the year, in New Brunswick, there are 149.4 rainfall days, and 28.43" (722mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, November and December. In New Brunswick, during December, snow falls for 2.9 days and regularly aggregates up to 1.02" (26mm) of snow. In New Brunswick, during the entire year, snow falls for 18.3 days, and aggregates up to 8.46" (215mm) of snow.

Daylight

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

Sunshine

In New Brunswick, New Jersey, the average sunshine in December 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 New Brunswick. A UV Index of 2, and less, symbolizes a low health risk from the exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 2 transform into the following instructions:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. 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 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in December in New Brunswick?

In New Brunswick, 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 are the most humid months in New Brunswick?

February, October and December, with an average relative humidity of 77%, are most humid months in New Brunswick, New Jersey.

What is the average humidity in December in New Brunswick?

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

How much does it rain in New Brunswick in December?

In New Brunswick, in December, during 10.2 rainfall days, 2.83" (72mm) of precipitation is typically accumulated.

How many days does it snow in December in New Brunswick?

In New Brunswick, New Jersey, in December, during 2.9 snowfall days, 1.02" (26mm) of snow is typically accumulated.

What is the month with the shortest days in New Brunswick?

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

What is the average length of the day in December in New Brunswick?

In December, the average length of the day is 9.3h.

How long on average sun shines in December in New Brunswick?

The average sunshine in December in New Brunswick is 4.8h.

When is the lowest UV index in New Brunswick?

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

How high is the UV index in December in New Brunswick?

The average daily maximum UV index in December in New Brunswick, New Jersey, is 2. A UV Index estimate of 2, and below, represents a low health threat from unprotected exposure to the UV radiation.

Average temperature in December
New Brunswick, NJ

Average temperature in December - New Brunswick, NJ
  • Average high temperature in December: 43°F

The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (36.7°F).

  • Average low temperature in December: 31.8°F

The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).

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Average pressure in December
New Brunswick, NJ

Average pressure in December - New Brunswick, NJ
  • Average pressure in December: 30.08"

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

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Average wind speed in December
New Brunswick, NJ

Average wind speed in December - New Brunswick, NJ
  • Average wind speed in December: 8.3mph

The windiest month (with the highest average wind speed) is March (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.9mph).

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Average humidity in December
New Brunswick, NJ

Average humidity in December - New Brunswick, NJ
  • Average humidity in December: 77%

Months with the highest relative humidity are February, October and December (77%).
Months with the lowest relative humidity are April and August (72%).

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Average rainfall in December
New Brunswick, NJ

Average rainfall in December - New Brunswick, NJ
  • Average rainfall in December: 2.83"

The wettest month (with the highest rainfall) is July (3.27").
The driest month (with the least rainfall) is September (1.61").

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Average rainfall days in December
New Brunswick, NJ

Average rainfall days in December - New Brunswick, NJ
  • Average rainfall days in December: 10.2 days

The month with the highest number of rainy days is July (16.6 days).
The month with the least rainy days is January (7.9 days).

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Average snowfall in December
New Brunswick, NJ

Average snowfall in December - New Brunswick, NJ
  • Average snowfall in December: 1.02"

The month with the highest snowfall is March (3.5").
Months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in December
New Brunswick, NJ

Average snowfall days in December - New Brunswick, NJ
  • Average snowfall days in December: 2.9 days

The month with the highest number of snowfall days is January (5.4 days).
Months with the least snowfall days are June, July, August, September and October (0 days).

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Average daylight in December /
Average sunshine in December
New Brunswick, NJ

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

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in December: 4.8h

The month with the most sunshine is July (Average sunshine: 10.4h).
The month with the least sunshine is February (Average sunshine: 4.6h).

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Average sunshine days in December
New Brunswick, NJ

Average sunshine days in December - New Brunswick, NJ
  • Average sunshine days in December: 18.5 days

The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is July (11.1 days).

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Average UV index in December
New Brunswick, NJ

Average UV index in December - New Brunswick, NJ
  • 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, March, November and December (UV index 2).

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Average cloud cover in December
New Brunswick, NJ

Average cloud cover in December - New Brunswick, NJ
  • Average cloud cover in December: 49

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 33).

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Average visibility in December
New Brunswick, NJ

Average visibility in December - New Brunswick, NJ
  • Average visibility in December: 6mi

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

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