December weather forecastNewark, NJ
December
Weather in December
December, the concluding month of the year, plunges Newark, New Jersey, USA, into the depths of winter. The temperature dip becomes readily apparent and a frosty ambiance prevails. December usually receives the highest volume of precipitation, with rainfall averaging 3.19" (81mm). There is a significant reduction in daylight hours to only 9.3 hours per day, highlighting the winter solstice phenomenon. Snowfall returns more insistently this month, accumulating an average of 1.38" (35mm) and painting a quintessential December winter landscape.Temperature
Transition into December in Newark marks a drop in the average high-temperature, moving from a cool 51.3°F (10.7°C) in November to a cold 42.1°F (5.6°C). In December, Newark experiences an average nighttime temperature of 32.9°F (0.5°C).Humidity
February, May, October and December, with an average relative humidity of 76%, are the most humid months.Rainfall
The wettest months are July and December, with an average 3.19" (81mm) of rainfall.Snowfall
January through April, November and December are months with snowfall. In December, it is snowing for 3.6 days. Throughout December, 1.38" (35mm) of snow is accumulated. In Newark, during the entire year, snow falls for 20.9 days and aggregates up to 8.94" (227mm) of snow.Ocean temperature
In Newark, the average seawater temperature in December is 47.1°F (8.4°C).Note: Beware of 47.1°F (8.4°C) waters at 55.4°F (13°C), they're uninviting, and a dip below 50°F (10°C) has risks of breath loss and cold shock, contingent on health.
Daylight
December has the shortest days of the year, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:02 am and sunset at 4:29 pm. On the last day of December, sunrise is at 7:20 am and sunset at 4:39 pm EST.
Sunshine
In December, the average sunshine 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 exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Newark, NJ
- Average high temperature in December: 42.1°F
The warmest month (with the highest average high temperature) is July (83.1°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 (68.9°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).
Average pressure in December
Newark, 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
Newark, NJ
- Average wind speed in December: 9.2mph
The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest month (with the lowest average wind speed) is July (6.3mph).
Average humidity in December
Newark, NJ
- Average humidity in December: 76%
The months with the highest relative humidity are February, May, October and December (76%).
The months with the lowest relative humidity are April and August (72%).
Average rainfall in December
Newark, NJ
- Average rainfall in December: 3.19"
The wettest months (with the highest rainfall) are July and December (3.19").
The driest month (with the least rainfall) is September (1.65").
Average rainfall days in December
Newark, NJ
- Average rainfall days in December: 11.9 days
The months with the highest number of rainy days are May and July (17.1 days).
The month with the least rainy days is November (9.5 days).
Average snowfall in December
Newark, NJ
- Average snowfall in December: 1.38"
The month with the highest snowfall is March (3.46").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Newark, NJ
- Average snowfall days in December: 3.6 days
The month with the highest number of snowfall days is January (6.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in December
Newark, 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
Newark, 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
Newark, NJ
- Average sunshine days in December: 15.6 days
The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is June (11.4 days).
Average UV index in December
Newark, 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
Newark, 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
Newark, 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).
