December weather forecast
Union City, NJ

Share

Weather in December

December in Union City confirms the arrival of winter as temperatures plummet to as low as 32.9°F (0.5°C). The short daylight hours and a decrease in sunshine, compared to long November's lights, dominate this month. With the city under the grip of a pronounced chill, and the days becoming increasingly short, outdoor activities take a backseat. The continuous drop in temperature coupled with frequent snowfall gives the city a beautiful snowy look. Despite the harsh weather conditions, the spirit of the holiday season keeps the city vibrant and lively.

Temperature

December in Union City, New Jersey, is characterized by a reduction in the average high-temperature, from a fresh 51.3°F (10.7°C) in November to an icy 42.1°F (5.6°C). The mean low-temperature during December nights in Union City is a still wintry 32.9°F (0.5°C).

Humidity

The months with the highest humidity in Union City are February and December, with an average relative humidity of 76%.

Rainfall

December is the month with the most rainfall. Rain falls for 12.5 days and accumulates 3.78" (96mm) of precipitation.

Snowfall

Months with snowfall are January through April, November and December. In Union City, in December, during 3.5 snowfall days, 1.61" (41mm) of snow is typically accumulated. Throughout the year, there are 22.7 snowfall days, and 10.79" (274mm) 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 7:01 am and sunset at 4:29 pm. On the last day of December, sunrise is at 7:20 am and sunset at 4:38 pm EST.

Sunshine

The average sunshine in December in Union City 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. A UV Index value of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for average individuals.
Note: A daily high UV index of 2 in December leads to these guidelines:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
[Resources]

Frequently asked questions

Is December cold in Union City?

In December, in Union City, the average high-temperature is 42.1°F (5.6°C), and the average low-temperature is 32.9°F (0.5°C). The average heat index (a.k.a. 'real feel', 'feels like'), which combines air temperature and relative humidity, in August is calculated to be 86°F (30°C).

What is the most humid month in Union City?

The months with the highest humidity in Union City are February and December, with an average relative humidity of 76%.

What is the average humidity in December in Union City?

In December, the average relative humidity in Union City is 76%.

What is the wettest month in Union City?

December is the month with the most rainfall in Union City. Rain falls for 12.5 days and accumulates 3.78" (96mm) of precipitation.

How much does it rain in Union City in December?

In December, the rain falls for 12.5 days. Throughout December, 3.78" (96mm) of precipitation is accumulated.

How much does it snow in Union City in December?

In Union City, New Jersey, in December, during 3.5 snowfall days, 1.61" (41mm) of snow is typically accumulated.

What is the month with the shortest days in Union City?

The month with the shortest days is December, with an average of 9h and 18min of daylight.

What is the average length of the day in December in Union City?

In Union City, the average day length in December is 9h and 19min.

When is the sunrise / sunset in December in Union City?

On the first day of December, sunrise is at 7:01 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:38 pm EST.

How long on average sun shines in December in Union City?

The average sunshine duration in December is 4.9h.

What are the months with the lowest UV index in Union City?

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

What is the UV index intensity in December in Union City?

The average daily maximum UV index in December in Union City is 2. A UV Index estimate of 2, and below, represents 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
Union City, NJ

Average temperature in December - Union City, NJ
  • Average high temperature in December: 42.1°F

The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (36.3°F).

  • Average low temperature in December: 32.9°F

The month with the highest average low temperature is July (69.3°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).

[Resources]

Average pressure in December
Union City, NJ

Average pressure in December - Union City, NJ
  • Average pressure in December: 30.07"Hg

The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

[Resources]

Average wind speed in December
Union City, NJ

Average wind speed in December - Union City, NJ
  • Average wind speed in December: 9.2mph

The windiest month (with the highest average wind speed) is January (9.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).

[Resources]

Average humidity in December
Union City, NJ

Average humidity in December - Union City, NJ
  • Average humidity in December: 76%

The months with the highest relative humidity are February and December (76%).
The month with the lowest relative humidity is August (70%).

[Resources]

Average rainfall in December
Union City, NJ

Average rainfall in December - Union City, NJ
  • Average rainfall in December: 3.78"

The wettest month (with the highest rainfall) is December (3.78").
The driest month (with the least rainfall) is September (2.2").

[Resources]

Average rainfall days in December
Union City, NJ

Average rainfall days in December - Union City, NJ
  • Average rainfall days in December: 12.5 days

The month with the highest number of rainy days is July (16.8 days).
The month with the least rainy days is January (9 days).

[Resources]

Average snowfall in December
Union City, NJ

Average snowfall in December - Union City, NJ
  • Average snowfall in December: 1.61"

The month with the highest snowfall is March (3.86").
The months with the least snowfall are May, June, July, August, September and October (0").

[Resources]

Average snowfall days in December
Union City, NJ

Average snowfall days in December - Union City, NJ
  • Average snowfall days in December: 3.5 days

The month with the highest number of snowfall days is February (6.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

[Resources]

Average daylight in December /
Average sunshine in December
Union City, NJ

Average daylight in December / Average sunshine in December - Union City, 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 48min).

[Resources]

Average sunshine days in December
Union City, NJ

Average sunshine days in December - Union City, NJ
  • Average sunshine days in December: 15.9 days

The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is June (11.7 days).

[Resources]

Average UV index in December
Union City, NJ

Average UV index in December - Union City, 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
Union City, NJ

Average cloud cover in December - Union City, NJ
  • Average cloud cover in December: 47

The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 30).

[Resources]

Average visibility in December
Union City, NJ

Average visibility in December - Union City, 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]

Union City, New Jersey, USA

Weather forecast for your location

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