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
Welcoming December, South Orange observes a shift in the average high-temperature, falling from November's fresh 50.9°F (10.5°C) to a wintry 41.9°F (5.5°C). South Orange observes an average low-temperature of 31.1°F (-0.5°C) during December nights.Humidity
The months with the highest humidity in South Orange are February and December, with an average relative humidity of 77%.Rainfall
The month with the most rainfall in South Orange is December, when the rain falls for 11.6 days and typically aggregates up to 3.54" (90mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In December, in South Orange, it is snowing for 3.4 days. Throughout December, 1.73" (44mm) of snow is accumulated. Throughout the year, there are 24.3 snowfall days, and 10.91" (277mm) 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 December in South Orange, 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
In December, the average sunshine in South Orange is 5h.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 exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 2 during December translates into the following guidance:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in South Orange?
What are the most humid months in South Orange?
What is the average humidity in December in South Orange?
What is the rainiest month in South Orange?
How much does it rain in South Orange in December?
How many days does it snow in December in South Orange?
What is the month with the shortest days in South Orange?
What is the average length of the day in December in South Orange?
What time are sunrise and sunset in December in South Orange?
How long on average sun shines in December in South Orange?
What is the month with the lowest UV index in South Orange?
What is the UV index reading in December in South Orange?
Average temperature in December
South Orange, NJ
- Average high temperature in December: 41.9°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (35.6°F).
- Average low temperature in December: 31.1°F
The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in December
South Orange, 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
South Orange, NJ
- Average wind speed in December: 8.5mph
The windiest months (with the highest average wind speed) are January and March (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in December
South Orange, NJ
- Average humidity in December: 77%
The months with the highest relative humidity are February and December (77%).
The month with the lowest relative humidity is August (71%).
Average rainfall in December
South Orange, NJ
- Average rainfall in December: 3.54"
The wettest month (with the highest rainfall) is December (3.54").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days in December
South Orange, NJ
- Average rainfall days in December: 11.6 days
The months with the highest number of rainy days are May and July (17.3 days).
The month with the least rainy days is January (9.3 days).
Average snowfall in December
South Orange, NJ
- Average snowfall in December: 1.73"
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
South Orange, NJ
- Average snowfall days in December: 3.4 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 Orange, NJ
- Average daylight in December: 9h and 2min
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: 5h and 0min
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).
Average sunshine days in December
South Orange, NJ
- Average sunshine days in December: 16.3 days
The month with the most sunshine days is November (18.2 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in December
South Orange, 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 Orange, 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 Orange, 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 Orange, New Jersey, USA
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