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
The start of December signals a decrease in the average high-temperature, transitioning from a fresh 50.4°F (10.2°C) in November to a wintry 41.2°F (5.1°C). An average low-temperature of 29.7°F (-1.3°C) is observed during the December nights.Humidity
In December, the average relative humidity in New Vernon is 79%.Rainfall
In New Vernon, in December, during 9.9 rainfall days, 2.56" (65mm) of precipitation is typically accumulated. Throughout the year, there are 155.7 rainfall days, and 27.64" (702mm) of precipitation is accumulated.Snowfall
January through May, November and December are months with snowfall in New Vernon. In New Vernon, New Jersey, during December, snow falls for 3.7 days and regularly aggregates up to 1.34" (34mm) of snow. Throughout the year, there are 24.7 snowfall days, and 10.83" (275mm) of snow is accumulated.Daylight
December has the shortest days of the year in New Vernon, with an average of 9h and 18min of daylight.On the first day of December in New Vernon, sunrise is at 7:03 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:40 pm EST.
Sunshine
In New Vernon, New Jersey, the average sunshine in December is 4.8h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in New Vernon. A UV Index value of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Frequently asked questions
How cold is December in New Vernon?
What is the average humidity in December in New Vernon?
How much does it rain in New Vernon in December?
How many days does it snow in December in New Vernon?
What is the month with the shortest days in New Vernon?
How many hours of daylight does New Vernon have in December?
What time are sunrise and sunset in December in New Vernon?
How many hours of sunshine does New Vernon have in December?
What are the months with the lowest UV index in New Vernon?
How high is the UV index in December in New Vernon?
Average temperature in December
New Vernon, NJ
- Average high temperature in December: 41.2°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (35.1°F).
- Average low temperature in December: 29.7°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure in December
New Vernon, 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
New Vernon, NJ
- Average wind speed in December: 7.6mph
The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity in December
New Vernon, 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 (74%).
Average rainfall in December
New Vernon, NJ
- Average rainfall in December: 2.56"
The wettest month (with the highest rainfall) is July (3.11").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days in December
New Vernon, NJ
- Average rainfall days in December: 9.9 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in December
New Vernon, NJ
- Average snowfall in December: 1.34"
The month with the highest snowfall is March (4.09").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
New Vernon, NJ
- Average snowfall days in December: 3.7 days
The month with the highest number of snowfall days is January (7.2 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
New Vernon, 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 18min).
- Average sunshine in December: 4h and 5min
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
New Vernon, NJ
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is July (11.2 days).
Average UV index in December
New Vernon, NJ
- Average UV index in December: 2
The months with the highest UV index are 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
New Vernon, NJ
- Average cloud cover in December: 49
The months with the most cloud cover are February, March and December (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in December
New Vernon, NJ
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, July, August, October, November and December (6mi).
The months with the lowest visibility are May, June and September (5mi).
New Vernon, New Jersey, USA
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