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 Arlington's progression into December involves a drop in the average high-temperature, receding from a frosty 48.6°F (9.2°C) in November to an icy 39.2°F (4°C). The temperature dips to an average of 27.7°F (-2.4°C) during December nights.Humidity
The months with the highest humidity are February, October and December, with an average relative humidity of 81%.Rainfall
In Mount Arlington, during December, the rain falls for 11 days and regularly aggregates up to 3.54" (90mm) of precipitation. In Mount Arlington, during the entire year, the rain falls for 160.1 days and collects up to 35.87" (911mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Mount Arlington, in December, during 6.7 snowfall days, 3.94" (100mm) of snow is typically accumulated. Throughout the year, there are 40.2 snowfall days, and 23.62" (600mm) of snow is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.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 December, the average sunshine is 4.6h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index in Mount Arlington. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the average person.Note: In December, an average UV index of 1 transforms into the following instructions:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. When the Sun is at its strongest around midday, find shade and limit exposure. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What are the most humid months?
What is the average humidity in December?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
How many hours of sunshine does Mount Arlington have in December?
What is the month with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Mount Arlington, NJ
- Average high temperature in December: 39.2°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (33.3°F).
- Average low temperature in December: 27.7°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in December
Mount Arlington, 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
Mount Arlington, NJ
- Average wind speed in December: 7.3mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in December
Mount Arlington, 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
Mount Arlington, NJ
- Average rainfall in December: 3.54"
The wettest month (with the highest rainfall) is July (3.66").
The driest month (with the least rainfall) is September (2.05").
Average rainfall days in December
Mount Arlington, NJ
- Average rainfall days in December: 11 days
The months with the highest number of rainy days are May and July (17.4 days).
The month with the least rainy days is January (7.5 days).
Average snowfall in December
Mount Arlington, NJ
- Average snowfall in December: 3.94"
The month with the highest snowfall is February (5.71").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Mount Arlington, NJ
- Average snowfall days in December: 6.7 days
The month with the highest number of snowfall days is February (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Mount Arlington, NJ
- Average daylight in December: 9h and 2min
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 4min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).
Average sunshine days in December
Mount Arlington, NJ
- Average sunshine days in December: 15.2 days
The month with the most sunshine days is November (16.4 days).
The month with the least sunshine days is June (10.6 days).
Average UV index in December
Mount Arlington, NJ
- Average UV index in December: 1
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Mount Arlington, NJ
- Average cloud cover in December: 52
The months with the most cloud cover are February, March and December (Cloud cover 52).
The months with the least cloud cover are July and August (Cloud cover 37).
Average visibility in December
Mount Arlington, 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).
Mount Arlington, New Jersey, USA
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