Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
As South Hackensack enters December, the average high-temperature decreases from the a fresh 51.1°F (10.6°C) of November to a wintry 41.9°F (5.5°C). During the month of December, South Hackensack experiences a steady low-temperature average of 31.8°F (-0.1°C).Humidity
In South Hackensack, the average relative humidity in December is 76%.Rainfall
December is the month with the most rainfall. Rain falls for 11.6 days and accumulates 3.15" (80mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In South Hackensack, in December, during 3.6 snowfall days, 1.54" (39mm) of snow is typically accumulated. Throughout the year, there are 22.5 snowfall days, and 9.17" (233mm) 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
In South Hackensack, 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. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 2 in December translates into these instructions:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. 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
How cold does it get in December?
What is the average humidity in December?
What is the rainiest month?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does South Hackensack have in December?
What time are sunrise and sunset in December?
How long on average sun shines in December?
When is the lowest UV index in South Hackensack?
What is the UV index intensity in December?
Average temperature in December
South Hackensack, NJ
- Average high temperature in December: 41.9°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (35.6°F).
- Average low temperature in December: 31.8°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (24.4°F).
Average pressure in December
South Hackensack, 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
South Hackensack, NJ
- Average wind speed in December: 8.5mph
The windiest month (with the highest average wind speed) is January (9mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in December
South Hackensack, NJ
- Average humidity in December: 76%
The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is August (70%).
Average rainfall in December
South Hackensack, NJ
- Average rainfall in December: 3.15"
The wettest month (with the highest rainfall) is December (3.15").
The driest month (with the least rainfall) is September (1.61").
Average rainfall days in December
South Hackensack, NJ
- Average rainfall days in December: 11.6 days
The month with the highest number of rainy days is May (16.2 days).
The month with the least rainy days is January (8.5 days).
Average snowfall in December
South Hackensack, NJ
- Average snowfall in December: 1.54"
The month with the highest snowfall is March (2.87").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
South Hackensack, NJ
- Average snowfall days in December: 3.6 days
The month with the highest number of snowfall days is February (7.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
South Hackensack, 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 42min).
Average sunshine days in December
South Hackensack, NJ
- Average sunshine days in December: 15.7 days
The month with the most sunshine days is November (18.4 days).
The months with the least sunshine days are May and June (12.7 days).
Average UV index in December
South Hackensack, 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
South Hackensack, NJ
- Average cloud cover in December: 47
The month with the most cloud cover is March (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 31).
Average visibility in December
South Hackensack, 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).
South Hackensack, New Jersey, USA
Weather forecast for your location
2. Allow the app to use your location