December weather forecast
Succasunna, NJ

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Weather in December

December, the first month of the winter in Succasunna, is also an icy month, with an average temperature varying between 28.6°F (-1.9°C) and 40.1°F (4.5°C).

Temperature

December brings a decrease in the average high-temperature, falling from November's chilly 49.3°F (9.6°C) to a cold 40.1°F (4.5°C). In December, Succasunna experiences an average nighttime temperature of 28.6°F (-1.9°C).

Humidity

February, October and December, with an average relative humidity of 81%, are the most humid months.

Rainfall

In Succasunna, in December, it is raining for 5.5 days, with typically 0.71" (18mm) of accumulated precipitation. In Succasunna, during the entire year, the rain falls for 81.9 days and collects up to 6.69" (170mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In Succasunna, New Jersey, in December, during 2.5 snowfall days, 0.47" (12mm) of snow is typically accumulated. Throughout the year, in Succasunna, there are 18.1 snowfall days, and 2.68" (68mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 18min of daylight.
On the first day of the month, sunrise is at 7:04 am and sunset at 4:31 pm. On the last day of December, sunrise is at 7:22 am and sunset at 4:40 pm EST.

Sunshine

In December, the average sunshine is 4.7h.

UV index

The months with the lowest UV index in Succasunna are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for average individuals.
Note: In December, a daily UV index of 2 turns into the following recommendations:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
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Frequently asked questions

How cold is December in Succasunna?

The high-temperature, in December, in Succasunna, is 40.1°F (4.5°C), while the low-temperature averages to 28.6°F (-1.9°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in August is calculated to be 86°F (30°C).

What is the most humid month in Succasunna?

February, October and December, with an average relative humidity of 81%, are most humid months.

What is the average humidity in December in Succasunna?

In December, the average relative humidity in Succasunna is 81%.

How many days does it rain in December in Succasunna?

In December, the rain falls for 5.5 days. Throughout December, 0.71" (18mm) of precipitation is accumulated.

How much does it snow in Succasunna in December?

In Succasunna, New Jersey, in December, snow falls for 2.5 days, with typically accumulated 0.47" (12mm) of snow.

What is the month with the shortest days in Succasunna?

December has the shortest days of the year in Succasunna, New Jersey, with an average of 9h and 18min of daylight.

How many hours of daylight does Succasunna have in December?

The average day length in December is 9h and 18min.

What time are sunrise and sunset in December in Succasunna?

In December, on the first day of the month, sunrise is at 7:04 am and sunset at 4:31 pm. On the last day of the month, in Succasunna, sunrise is at 7:22 am and sunset at 4:40 pm EST.

How many hours of sunshine does Succasunna have in December?

In December, the average sunshine duration in Succasunna is 4.7h.

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

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

What is the UV index reading in December in Succasunna?

In December, the average daily maximum UV index is 2. A UV Index estimate 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
Succasunna, NJ

Average temperature in December - Succasunna, NJ
  • Average high temperature in December: 40.1°F

The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (34.3°F).

  • Average low temperature in December: 28.6°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (20.8°F).

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Average pressure in December
Succasunna, NJ

Average pressure in December - Succasunna, 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
Succasunna, NJ

Average wind speed in December - Succasunna, NJ
  • Average wind speed in December: 7.4mph

The windiest month (with the highest average wind speed) is March (8.2mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).

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Average humidity in December
Succasunna, NJ

Average humidity in December - Succasunna, NJ
  • Average humidity in December: 81%

The months with the highest relative humidity are February, October and December (81%).
The month with the lowest relative humidity is April (75%).

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Average rainfall in December
Succasunna, NJ

Average rainfall in December - Succasunna, NJ
  • Average rainfall in December: 0.71"

The wettest month (with the highest rainfall) is July (0.79").
The driest month (with the least rainfall) is September (0.16").

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Average rainfall days in December
Succasunna, NJ

Average rainfall days in December - Succasunna, NJ
  • Average rainfall days in December: 5.5 days

The month with the highest number of rainy days is July (9.5 days).
The month with the least rainy days is February (4 days).

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Average snowfall in December
Succasunna, NJ

Average snowfall in December - Succasunna, NJ
  • Average snowfall in December: 0.47"

The month with the highest snowfall is March (0.79").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Succasunna, NJ

Average snowfall days in December - Succasunna, NJ
  • Average snowfall days in December: 2.5 days

The month with the highest number of snowfall days is February (5.3 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
Succasunna, NJ

Average daylight in December / Average sunshine in December - Succasunna, 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 4min

The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).

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Average sunshine days in December
Succasunna, NJ

Average sunshine days in December - Succasunna, NJ
  • Average sunshine days in December: 24.1 days

The month with the most sunshine days is November (24.5 days).
The month with the least sunshine days is July (18.3 days).

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Average UV index in December
Succasunna, NJ

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

The months with the highest UV index are June and July (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
Succasunna, NJ

Average cloud cover in December - Succasunna, NJ
  • Average cloud cover in December: 50

The months with the most cloud cover are February and March (Cloud cover 51).
The months with the least cloud cover are July and August (Cloud cover 36).

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Average visibility in December
Succasunna, NJ

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

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

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Succasunna, New Jersey, USA

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