December weather forecast
Roosevelt, NJ

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Weather in December

The first month of the winter, December, is also a frosty month in Roosevelt, New Jersey, with an average temperature ranging between max 43.9°F (6.6°C) and min 32.7°F (0.4°C).

Temperature

The arrival of December corresponds with a minor reduction in the average high-temperature, down from November's cool 52.5°F (11.4°C) to a chilly 43.9°F (6.6°C). December brings an average low-temperature of 32.7°F (0.4°C) to Roosevelt.

Humidity

In December, the average relative humidity is 78%.

Rainfall

In Roosevelt, in December, it is raining for 11 days, with typically 2.95" (75mm) of accumulated precipitation. In Roosevelt, during the entire year, the rain falls for 154.3 days and collects up to 29.25" (743mm) of precipitation.

Snowfall

January through May, November and December are months with snowfall. In December, it is snowing for 3.2 days. Throughout December, 1.14" (29mm) of snow is accumulated. Throughout the year, there are 18.9 snowfall days, and 8.39" (213mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 24min of daylight.
On the first day of December, sunrise is at 7:01 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:42 pm EST.

Sunshine

In Roosevelt, the average sunshine in December is 5h.

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 reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: A maximum UV index of 2 in December translates 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 solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.

Frequently asked questions

How cold is it in December?

In Roosevelt, 43.9°F (6.6°C) is the average high-temperature and 32.7°F (0.4°C) is the average low-temperature during December. In August, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines air temperature and relative humidity, is calculated to be 87.8°F (31°C).

What is the average humidity in December in Roosevelt?

The average relative humidity in December is 78%.

How much does it rain in December?

In Roosevelt, in December, it is raining for 11 days, with typically 2.95" (75mm) of accumulated precipitation.

How many days does it snow in December?

In December, it is snowing for 3.2 days. Throughout December, 1.14" (29mm) of snow is accumulated.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 24min of daylight.

How many hours of daylight does Roosevelt have in December?

The average day length in December is 9h and 22min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:01 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:42 pm EST.

How long on average sun shines in December?

The average sunshine duration in December in Roosevelt is 5h.

When is the lowest UV index?

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

What is the UV index intensity in December?

In December, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a low health risk 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
Roosevelt, NJ

Average temperature in December - Roosevelt, NJ
  • Average high temperature in December: 43.9°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (37.4°F).

  • Average low temperature in December: 32.7°F

The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (25.3°F).

Average pressure in December
Roosevelt, NJ

Average pressure in December - Roosevelt, 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).

Average wind speed in December
Roosevelt, NJ

Average wind speed in December - Roosevelt, NJ
  • Average wind speed in December: 8.5mph

The windiest month (with the highest average wind speed) is March (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

Average humidity in December
Roosevelt, NJ

Average humidity in December - Roosevelt, NJ
  • Average humidity in December: 78%

The months with the highest relative humidity are June and October (79%).
The month with the lowest relative humidity is April (73%).

Average rainfall in December
Roosevelt, NJ

Average rainfall in December - Roosevelt, NJ
  • Average rainfall in December: 2.95"

The wettest month (with the highest rainfall) is July (3.5").
The driest month (with the least rainfall) is September (1.69").

Average rainfall days in December
Roosevelt, NJ

Average rainfall days in December - Roosevelt, NJ
  • Average rainfall days in December: 11 days

The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is January (8.4 days).

Average snowfall in December
Roosevelt, NJ

Average snowfall in December - Roosevelt, NJ
  • Average snowfall in December: 1.14"

The month with the highest snowfall is March (3.23").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in December
Roosevelt, NJ

Average snowfall days in December - Roosevelt, NJ
  • Average snowfall days in December: 3.2 days

The month with the highest number of snowfall days is January (5.3 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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

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

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in December: 5h and 0min

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).

Average sunshine days in December
Roosevelt, NJ

Average sunshine days in December - Roosevelt, NJ
  • Average sunshine days in December: 18.4 days

The month with the most sunshine days is November (19 days).
The month with the least sunshine days is July (10.8 days).

Average UV index in December
Roosevelt, NJ

Average UV index in December - Roosevelt, 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).

Average cloud cover in December
Roosevelt, NJ

Average cloud cover in December - Roosevelt, 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 31).

Average visibility in December
Roosevelt, NJ

Average visibility in December - Roosevelt, 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).

Roosevelt, New Jersey, USA

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