December weather forecast
Cedar Grove, NJ

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Weather in December

December, the first month of the winter in Cedar Grove, is also an icy month, with temperature in the range of an average high of 41.5°F (5.3°C) and an average low of 31.1°F (-0.5°C).

Temperature

December's onset brings a slight change in high-temperatures, falling from a cool 50.7°F (10.4°C) in November to a cold 41.5°F (5.3°C). During December, Cedar Grove consistently records a temperature low averaging a freezing cold 31.1°F (-0.5°C).

Humidity

In December, the average relative humidity is 77%.

Rainfall

In Cedar Grove, New Jersey, in December, during 10.6 rainfall days, 2.24" (57mm) of precipitation is typically accumulated. In Cedar Grove, during the entire year, the rain falls for 153.3 days and collects up to 24.92" (633mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall. In December, in Cedar Grove, it is snowing for 3.6 days. Throughout December, 1.18" (30mm) of snow is accumulated. Throughout the year, there are 22.1 snowfall days, and 8.9" (226mm) of snow is accumulated.

Daylight

With an average of 9h and 18min of daylight, December has the shortest days of the year in Cedar Grove.
On the first day of December, sunrise is at 7:02 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:39 pm EST.

Sunshine

The average sunshine in December in Cedar Grove is 4.9h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Cedar Grove. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: In December, the maximum UV index of 2 translates into these guidelines:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. 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. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
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Frequently asked questions

How cold is December in Cedar Grove?

In Cedar Grove, 41.5°F (5.3°C) is the average high-temperature and 31.1°F (-0.5°C) is the average low-temperature during December. In August, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which represents the influence of relative humidity on air temperature, is evaluated at 86°F (30°C).

What is the average humidity in December in Cedar Grove?

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

How much does it rain in Cedar Grove in December?

In Cedar Grove, New Jersey, in December, it is raining for 10.6 days, with typically 2.24" (57mm) of accumulated precipitation.

How many days does it snow in December in Cedar Grove?

In Cedar Grove, New Jersey, in December, snow falls for 3.6 days, with typically accumulated 1.18" (30mm) of snow.

What is the month with the shortest days in Cedar Grove?

The month with the shortest days in Cedar Grove, New Jersey, is December, with an average of 9h and 18min of daylight.

How many hours of daylight does Cedar Grove have in December?

In Cedar Grove, New Jersey, the average day length in December is 9h and 18min.

When is the sunrise / sunset in December in Cedar Grove?

On the first day of December in Cedar Grove, sunrise is at 7:02 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:39 pm EST.

How long on average sun shines in December in Cedar Grove?

In Cedar Grove, the average sunshine duration in December is 4.9h.

When is the lowest UV index in Cedar Grove?

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

What is the UV index reading in December in Cedar Grove?

In Cedar Grove, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to Sun's UV rays.
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
Cedar Grove, NJ

Average temperature in December - Cedar Grove, NJ
  • Average high temperature in December: 41.5°F

The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (35.2°F).

  • Average low temperature in December: 31.1°F

The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (23.9°F).

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Average pressure in December
Cedar Grove, NJ

Average pressure in December - Cedar Grove, 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
Cedar Grove, NJ

Average wind speed in December - Cedar Grove, NJ
  • Average wind speed in December: 8.1mph

The windiest months (with the highest average wind speed) are January and March (8.8mph).
The calmest month (with the lowest average wind speed) is July (5.7mph).

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Average humidity in December
Cedar Grove, NJ

Average humidity in December - Cedar Grove, NJ
  • Average humidity in December: 77%

The month with the highest relative humidity is February (78%).
The months with the lowest relative humidity are April and August (72%).

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Average rainfall in December
Cedar Grove, NJ

Average rainfall in December - Cedar Grove, NJ
  • Average rainfall in December: 2.24"

The wettest month (with the highest rainfall) is July (3.07").
The driest month (with the least rainfall) is January (1.38").

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Average rainfall days in December
Cedar Grove, NJ

Average rainfall days in December - Cedar Grove, NJ
  • Average rainfall days in December: 10.6 days

The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is January (7.6 days).

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Average snowfall in December
Cedar Grove, NJ

Average snowfall in December - Cedar Grove, NJ
  • Average snowfall in December: 1.18"

The month with the highest snowfall is March (3.27").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in December
Cedar Grove, NJ

Average snowfall days in December - Cedar Grove, NJ
  • Average snowfall days in December: 3.6 days

The month with the highest number of snowfall days is February (6.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in December /
Average sunshine in December
Cedar Grove, NJ

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

The month with the longest days is June (Average daylight: 15h and 6min).
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 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

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Average sunshine days in December
Cedar Grove, NJ

Average sunshine days in December - Cedar Grove, NJ
  • Average sunshine days in December: 17.3 days

The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is July (10.7 days).

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Average UV index in December
Cedar Grove, NJ

Average UV index in December - Cedar Grove, 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
Cedar Grove, NJ

Average cloud cover in December - Cedar Grove, NJ
  • Average cloud cover in December: 47

The months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 31).

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Average visibility in December
Cedar Grove, NJ

Average visibility in December - Cedar Grove, NJ
  • Average visibility in December: 6mi

The 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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Cedar Grove, New Jersey, USA

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