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 Ong enters December, the average high-temperature subtly lowers from the a cool 53.1°F (11.7°C) of November to a chilly 44.6°F (7°C). The nighttime temperature dips to an icy 33.4°F (0.8°C) on average during December.Humidity
The average relative humidity in December is 77%.Rainfall
In December, the rain falls for 9 days. Throughout December, 1.38" (35mm) of precipitation is accumulated. In Ong, during the entire year, the rain falls for 120.9 days and collects up to 12.8" (325mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In Ong, in December, snow falls for 2.5 days, with typically accumulated 0.59" (15mm) of snow. Throughout the year, there are 14.6 snowfall days, and 3.15" (80mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 24min of daylight.On the first day of December, sunrise is at 7:01 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:43 pm EST.
Sunshine
The average sunshine in December is 5.1h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: In December, a daily maximum UV index of 2 leads to the following instructions:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Ong have in December?
What is the month with the lowest UV index in Ong?
What is the UV index intensity in December?
Average temperature in December
Ong, NJ
- Average high temperature in December: 44.6°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in December: 33.4°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 (26.2°F).
Average pressure in December
Ong, NJ
- Average pressure in December: 30.09"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
Ong, NJ
- Average wind speed in December: 8.1mph
The windiest months (with the highest average wind speed) are February, March and April (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity in December
Ong, NJ
- Average humidity in December: 77%
The month with the highest relative humidity is June (79%).
The month with the lowest relative humidity is April (72%).
Average rainfall in December
Ong, NJ
- Average rainfall in December: 1.38"
The wettest month (with the highest rainfall) is July (1.69").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in December
Ong, NJ
- Average rainfall days in December: 9 days
The month with the highest number of rainy days is July (14.6 days).
The month with the least rainy days is January (5.8 days).
Average snowfall in December
Ong, NJ
- Average snowfall in December: 0.59"
The month with the highest snowfall is March (0.98").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Ong, NJ
- Average snowfall days in December: 2.5 days
The month with the highest number of snowfall days is January (4.5 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
Ong, 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 24min).
- Average sunshine in December: 5h and 1min
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 54min).
Average sunshine days in December
Ong, NJ
- Average sunshine days in December: 18.9 days
The months with the most sunshine days are January and November (21.3 days).
The month with the least sunshine days is July (13 days).
Average UV index in December
Ong, NJ
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Ong, NJ
- Average cloud cover in December: 46
The months with the most cloud cover are February and March (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 31).
Average visibility in December
Ong, 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).
Ong, New Jersey, USA
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