December weather forecastCopper Hill, NJ
December
Weather in December
The first month of the winter, December, is also an icy month in Copper Hill, New Jersey, with an average temperature varying between 30.6°F (-0.8°C) and 41.9°F (5.5°C).Temperature
December's arrival correlates with a reduction in the average high-temperature, down from a cool 50.9°F (10.5°C) in November to an icy 41.9°F (5.5°C). An average temperature of 30.6°F (-0.8°C) marks the nights in Copper Hill in December.Humidity
In December, the average relative humidity is 79%.Rainfall
In December, the rain falls for 7.7 days. Throughout December, 1.14" (29mm) of precipitation is accumulated. In Copper Hill, during the entire year, the rain falls for 112.6 days and collects up to 11.77" (299mm) of precipitation.Snowfall
January through May, November and December are months with snowfall. In Copper Hill, in December, snow falls for 2.6 days, with typically accumulated 0.79" (20mm) of snow. In Copper Hill, during the entire year, snow falls for 16.7 days and aggregates up to 3.98" (101mm) of snow.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year in Copper Hill.On the first day of December, sunrise is at 7:04 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:42 pm EST.
Sunshine
In Copper Hill, the average sunshine in December is 4.8h.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 estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: In December, a daily UV index of 2 turns into the following recommendations:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Boost your sun resistance with garments that are densely woven yet spacious. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Copper Hill, 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 (35.4°F).
- Average low temperature in December: 30.6°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (23°F).
Average pressure in December
Copper Hill, 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
Copper Hill, NJ
- Average wind speed in December: 7.8mph
The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in December
Copper Hill, NJ
- Average humidity in December: 79%
The months with the highest relative humidity are February and October (80%).
The month with the lowest relative humidity is April (75%).
Average rainfall in December
Copper Hill, NJ
- Average rainfall in December: 1.14"
The wettest month (with the highest rainfall) is July (1.46").
The driest month (with the least rainfall) is September (0.63").
Average rainfall days in December
Copper Hill, NJ
- Average rainfall days in December: 7.7 days
The month with the highest number of rainy days is May (13.1 days).
The month with the least rainy days is January (5.5 days).
Average snowfall in December
Copper Hill, NJ
- Average snowfall in December: 0.79"
The month with the highest snowfall is March (1.1").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Copper Hill, NJ
- Average snowfall days in December: 2.6 days
The month with the highest number of snowfall days is February (5.2 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Copper Hill, 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 48min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
Copper Hill, NJ
- Average sunshine days in December: 21.5 days
The month with the most sunshine days is November (22.2 days).
The month with the least sunshine days is June (15.6 days).
Average UV index in December
Copper Hill, 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, March, November and December (UV index 2).
Average cloud cover in December
Copper Hill, NJ
- Average cloud cover in December: 50
The months with the most cloud cover are February and December (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in December
Copper Hill, NJ
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, November and December (6mi).
The months with the lowest visibility are May, September and October (5mi).
