December weather forecastJersey City, NJ

December

Weather in December

December drowns Jersey City in the grip of winter, with average low temperatures dropping to 32.7°F (0.4°C). Along with the winter chill, there is a notable increase in snowfall with 1.77" (45mm), decorating the city in a typical winter wonderland fashion. Despite the cold, December's festive merriment manages to warm the spirit throughout this winter month.

Temperature

Jersey City's transition into December involves a gentle shift in temperature, receding from a fresh 51.3°F (10.7°C) in November to a cold 42.3°F (5.7°C). In December, Jersey City reports a consistent average low-temperature of 32.7°F (0.4°C) during the nights.

Humidity

The months with the highest humidity 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 3.74" (95mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall. In Jersey City, during December, snow falls for 3.7 days and regularly aggregates up to 1.77" (45mm) of snow. Throughout the year, in Jersey City, there are 22.9 snowfall days, and 10.63" (270mm) of snow is accumulated.

Ocean temperature

In Jersey City, the average seawater temperature in December is 47.1°F (8.4°C).
Note: Staying in 47.1°F (8.4°C) waters for just a few moments at 55.4°F (13°C) can be harrowing, and below 50°F (10°C) poses breathing and cold shock risks, depending on individual tolerance.

Daylight

December has the shortest days of the year, with an average of 9h and 18min of daylight.
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 4:39 pm EST.

Sunshine

In Jersey City, the average sunshine in December 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 Jersey City. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the average person.
Note: In December, a regular UV index of 2 translates into these guidelines:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.

Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The high-temperature, in December, in Jersey City, is 42.3°F (5.7°C), while the low-temperature averages to 32.7°F (0.4°C). In August, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines relative humidity and air temperature, is calculated to be 86°F (30°C).

February and December, with an average relative humidity of 76%, are most humid months in Jersey City, New Jersey.

The average relative humidity in December in Jersey City, New Jersey, is 76%.

December is the month with the most rainfall in Jersey City. Rain falls for 12.5 days and accumulates 3.74" (95mm) of precipitation.

In Jersey City, New Jersey, during December, the rain falls for 12.5 days and regularly aggregates up to 3.74" (95mm) of precipitation.

In Jersey City, in December, during 3.7 snowfall days, 1.77" (45mm) of snow is typically accumulated.

In Jersey City, New Jersey, the average seawater temperature in December is 47.1°F (8.4°C). Swimming in 47.1°F (8.4°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

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

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

On the first day of December in Jersey City, New Jersey, 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 4:39 pm EST.

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

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

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

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

51.3°F

42.3°F

36.5°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

9.7mph

9.9mph

10.4mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

0.7

3.7

6.5

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

17.5

15.5

17.8

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Jersey City, NJ

Average high temperature in December: 42.3°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 (36.5°F).

Average low temperature in December: 32.7°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 (25.9°F).

Average pressure in December
Jersey 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).

Average wind speed in December
Jersey City, NJ

Average wind speed in December: 9.3mph

The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).

Average humidity in December
Jersey 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 (71%).

Average rainfall in December
Jersey City, NJ

Average rainfall in December: 3.74"

The wettest month (with the highest rainfall) is December (3.74").
The driest month (with the least rainfall) is September (2.2").

Average rainfall days in December
Jersey City, NJ

Average rainfall days in December: 12.5 days

The month with the highest number of rainy days is July (17.9 days).
The month with the least rainy days is January (9 days).

Average snowfall in December
Jersey City, NJ

Average snowfall in December: 1.77"

The month with the highest snowfall is March (3.54").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Jersey City, NJ

Average snowfall days in December: 3.7 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).

Average sea temperature in December
Jersey City, NJ

Average sea temperature in December: 47.2°F

The best month for swimming (with the highest average sea temperature) is August (74.1°F).
The coldest month (with the lowest average sea temperature) is February (39.7°F).

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

Average daylight in December: 9h and 18min

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 18min).

Average sunshine in December: 4h and 54min

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
Jersey City, NJ

Average sunshine days in December: 15.5 days

The month with the most sunshine days is January (17.8 days).
The months with the least sunshine days are June and July (11.3 days).

Average UV index in December
Jersey 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).

Average cloud cover in December
Jersey City, 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 30).

Average visibility in December
Jersey 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).