December weather forecastHopatcong Heights, NJ
December
Weather in December
December, the first month of the winter in Hopatcong Heights, is still a cold month, with an average temperature fluctuating between 39.6°F (4.2°C) and 27.9°F (-2.3°C).Temperature
With December's arrival, Hopatcong Heights's weather changes as the average high-temperature falls from a chilly 49.1°F (9.5°C) in November to an icy 39.6°F (4.2°C). The nighttime temperature, during December, averages of 27.9°F (-2.3°C).Humidity
February, October and December, with an average relative humidity of 81%, are the most humid months in Hopatcong Heights.Rainfall
In December, the rain falls for 11.5 days. Throughout December, 2.95" (75mm) of precipitation is accumulated. In Hopatcong Heights, during the entire year, the rain falls for 162.3 days and collects up to 31.54" (801mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Hopatcong Heights. In December, it is snowing for 6 days. Throughout December, 3.27" (83mm) of snow is accumulated. Throughout the year, in Hopatcong Heights, there are 36.2 snowfall days, and 19.61" (498mm) of snow is accumulated.Daylight
December has the shortest days of the year in Hopatcong Heights, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:04 am and sunset at 4:31 pm. On the last day of December, sunrise is at 7:23 am and sunset at 4:40 pm EST.
Sunshine
In Hopatcong Heights, the average sunshine in December is 4.7h.UV index
December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index of 1 in December converts into the following recommendations:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Hopatcong Heights, NJ
- Average high temperature in December: 39.6°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in December: 27.9°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in December
Hopatcong Heights, 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
Hopatcong Heights, NJ
- Average wind speed in December: 7.3mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest months (with the lowest average wind speed) are July and August (5mph).
Average humidity in December
Hopatcong Heights, NJ
- Average humidity in December: 81%
The months with the highest relative humidity are February, October and December (81%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Hopatcong Heights, NJ
- Average rainfall in December: 2.95"
The wettest month (with the highest rainfall) is July (3.35").
The driest month (with the least rainfall) is September (1.65").
Average rainfall days in December
Hopatcong Heights, NJ
- Average rainfall days in December: 11.5 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (7.5 days).
Average snowfall in December
Hopatcong Heights, NJ
- Average snowfall in December: 3.27"
The month with the highest snowfall is February (4.61").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Hopatcong Heights, NJ
- Average snowfall days in December: 6 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Hopatcong Heights, NJ
- Average daylight in December: 9h and 18min
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 42min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days in December
Hopatcong Heights, NJ
- Average sunshine days in December: 14.9 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in December
Hopatcong Heights, NJ
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Hopatcong Heights, NJ
- Average cloud cover in December: 50
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in December
Hopatcong Heights, NJ
- Average visibility in December: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
