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
Mount Holly's weather subtly changes with the onset of December, barely falling from a fresh 53.1°F (11.7°C) in November to a chilly 44.2°F (6.8°C). In Mount Holly, an average temperature of 32.7°F (0.4°C) is noted during December nights.Humidity
In December, the average relative humidity in Mount Holly is 77%.Rainfall
In December, the rain falls for 8.1 days. Throughout December, 1.18" (30mm) of precipitation is accumulated. In Mount Holly, during the entire year, the rain falls for 120.1 days and collects up to 11.81" (300mm) of precipitation.Snowfall
Months with snowfall are January through March, November and December. In Mount Holly, New Jersey, in December, snow falls for 2.3 days, with typically accumulated 0.31" (8mm) of snow. In Mount Holly, during the entire year, snow falls for 12.9 days and aggregates up to 3.23" (82mm) of snow.Daylight
December has the shortest days of the year in Mount Holly, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:02 am and sunset at 4:34 pm. On the last day of December, in Mount Holly, sunrise is at 7:20 am and sunset at 4:44 pm EST.
Sunshine
In December, the average sunshine is 5.1h.UV index
The months with the lowest UV index in Mount Holly are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.Note: In December, the average maximum UV index of 2 translates into the following recommendations:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Frequently asked questions
How cold is December in Mount Holly?
What is the average humidity in December in Mount Holly?
How many days does it rain in December in Mount Holly?
How many days does it snow in December in Mount Holly?
What is the month with the shortest days in Mount Holly?
What is the average length of the day in December in Mount Holly?
When are sunrise and sunset in December in Mount Holly?
How many hours of sunshine does Mount Holly have in December?
What is the month with the lowest UV index in Mount Holly?
How high is the UV index in December in Mount Holly?
Average temperature in December
Mount Holly, NJ
- Average high temperature in December: 44.2°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (37.8°F).
- Average low temperature in December: 32.7°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 (25.5°F).
Average pressure in December
Mount Holly, 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
Mount Holly, NJ
- Average wind speed in December: 7.5mph
The windiest months (with the highest average wind speed) are March and April (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in December
Mount Holly, NJ
- Average humidity in December: 77%
The month with the highest relative humidity is October (78%).
The month with the lowest relative humidity is April (72%).
Average rainfall in December
Mount Holly, NJ
- Average rainfall in December: 1.18"
The wettest months (with the highest rainfall) are July and August (1.42").
The driest month (with the least rainfall) is January (0.63").
Average rainfall days in December
Mount Holly, NJ
- Average rainfall days in December: 8.1 days
The month with the highest number of rainy days is July (14.2 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in December
Mount Holly, NJ
- Average snowfall in December: 0.31"
The months with the highest snowfall are February and March (0.94").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Mount Holly, NJ
- Average snowfall days in December: 2.3 days
The month with the highest number of snowfall days is January (3.9 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
Mount Holly, 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 42min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in December
Mount Holly, NJ
- Average sunshine days in December: 20.2 days
The month with the most sunshine days is January (21.8 days).
The month with the least sunshine days is July (13 days).
Average UV index in December
Mount Holly, 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
Mount Holly, NJ
- Average cloud cover in December: 47
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in December
Mount Holly, 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).
Mount Holly, New Jersey, USA
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