December weather forecast
Roseland, NJ

Share

Weather in December

December, the first month of the winter in Roseland, is still a cold month, with an average temperature ranging between min 31.1°F (-0.5°C) and max 41.7°F (5.4°C).

Temperature

The onset of December introduces a moderate change in Roseland's weather, with average high-temperatures falling from November's cool 50.7°F (10.4°C) to a wintry 41.7°F (5.4°C). Roseland, during December nights, observes an average temperature of 31.1°F (-0.5°C).

Humidity

February and December, with an average relative humidity of 78%, are the most humid months in Roseland.

Rainfall

In Roseland, in December, it is raining for 9.5 days, with typically 1.26" (32mm) of accumulated precipitation. Throughout the year, in Roseland, there are 127.3 rainfall days, and 12.68" (322mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Roseland are January through April, October through December. In Roseland, in December, snow falls for 3.3 days, with typically accumulated 0.55" (14mm) of snow. In Roseland, during the entire year, snow falls for 19 days and aggregates up to 3.7" (94mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 18min of daylight.
On the first day of December, sunrise is at 7:02 am and sunset at 4:30 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 Roseland is 4.9h.

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 of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The UV index of 2 during December leads to these advisories:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. During bright days, sunglasses that offer UVA and UVB defense are recommended. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
[Resources]

Frequently asked questions

How cold does it get in Roseland in December?

In Roseland, 41.7°F (5.4°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. 'felt air temperature', 'feels like'), which combines air temperature and relative humidity, is computed to be 86°F (30°C).

What is the most humid month in Roseland?

The months with the highest humidity are February and December, with an average relative humidity of 78%.

What is the average humidity in December in Roseland?

In December, the average relative humidity is 78%.

How much does it rain in Roseland in December?

In Roseland, in December, it is raining for 9.5 days, with typically 1.26" (32mm) of accumulated precipitation.

How many days does it snow in December in Roseland?

In Roseland, in December, snow falls for 3.3 days, with typically accumulated 0.55" (14mm) of snow.

What is the month with the shortest days in Roseland?

With an average of 9h and 18min of daylight, December has the shortest days of the year.

How many hours of daylight does Roseland have in December?

In December, the average day length is 9h and 18min.

What time are sunrise and sunset in December in Roseland?

On the first day of December in Roseland, sunrise is at 7:02 am and sunset at 4:30 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 Roseland?

In Roseland, New Jersey, the average sunshine duration in December is 4.9h.

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

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

How high is the UV index in December in Roseland?

In December, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health 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
Roseland, NJ

Average temperature in December - Roseland, NJ
  • Average high temperature in December: 41.7°F

The warmest month (with the highest average high temperature) is July (83.7°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 (23.7°F).

[Resources]

Average pressure in December
Roseland, NJ

Average pressure in December - Roseland, 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).

[Resources]

Average wind speed in December
Roseland, NJ

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

The windiest month (with the highest average wind speed) is January (8.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).

[Resources]

Average humidity in December
Roseland, NJ

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

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

[Resources]

Average rainfall in December
Roseland, NJ

Average rainfall in December - Roseland, NJ
  • Average rainfall in December: 1.26"

The wettest month (with the highest rainfall) is July (1.61").
The driest month (with the least rainfall) is January (0.67").

[Resources]

Average rainfall days in December
Roseland, NJ

Average rainfall days in December - Roseland, NJ
  • Average rainfall days in December: 9.5 days

The month with the highest number of rainy days is July (15.5 days).
The month with the least rainy days is January (6.1 days).

[Resources]

Average snowfall in December
Roseland, NJ

Average snowfall in December - Roseland, NJ
  • Average snowfall in December: 0.55"

The month with the highest snowfall is March (1.22").
The months with the least snowfall are May, June, July, August and September (0").

[Resources]

Average snowfall days in December
Roseland, NJ

Average snowfall days in December - Roseland, NJ
  • Average snowfall days in December: 3.3 days

The month with the highest number of snowfall days is February (5.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

[Resources]

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

Average daylight in December / Average sunshine in December - Roseland, 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 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

[Resources]

Average sunshine days in December
Roseland, NJ

Average sunshine days in December - Roseland, NJ
  • Average sunshine days in December: 18.5 days

The month with the most sunshine days is November (21.3 days).
The month with the least sunshine days is July (12.5 days).

[Resources]

Average UV index in December
Roseland, NJ

Average UV index in December - Roseland, 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).

[Resources]

Average cloud cover in December
Roseland, NJ

Average cloud cover in December - Roseland, 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).

[Resources]

Average visibility in December
Roseland, NJ

Average visibility in December - Roseland, 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).

[Resources]

Roseland, New Jersey, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location