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
A moderate decline in average high-temperatures is noted in December, moving from a fresh 51.3°F (10.7°C) in November to a wintry 42.4°F (5.8°C). During the nights in December, Clark experiences a consistent average temperature of 32.9°F (0.5°C).Humidity
In Clark, the average relative humidity in December is 76%.Rainfall
In Clark, in December, during 7.3 rainfall days, 0.83" (21mm) of precipitation is typically accumulated. Throughout the year, in Clark, there are 110.2 rainfall days, and 8.9" (226mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. In Clark, during December, snow falls for 2.8 days and regularly aggregates up to 0.24" (6mm) of snow. In Clark, during the entire year, snow falls for 14.5 days and aggregates up to 1.85" (47mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:02 am and sunset at 4:30 pm. On the last day of December, in Clark, sunrise is at 7:20 am and sunset at 4:40 pm EST.
Sunshine
In Clark, the average sunshine in December is 4.9h.UV index
The months with the lowest UV index in Clark are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for the average person.Note: The UV index of 2 during December translates into the following guidance:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Frequently asked questions
How cold is it in Clark in December?
What is the average humidity in December in Clark?
How much does it rain in Clark in December?
How many days does it snow in December in Clark?
What is the month with the shortest days in Clark?
How many hours of daylight does Clark have in December?
What time are sunrise and sunset in December in Clark?
How many hours of sunshine does Clark have in December?
What are the months with the lowest UV index in Clark?
What is the UV index reading in December in Clark?
Average temperature in December
Clark, NJ
- Average high temperature in December: 42.4°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (36.5°F).
- Average low temperature in December: 32.9°F
The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).
Average pressure in December
Clark, 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
Clark, NJ
- Average wind speed in December: 8.9mph
The windiest months (with the highest average wind speed) are January and March (9.6mph).
The calmest month (with the lowest average wind speed) is July (6.3mph).
Average humidity in December
Clark, NJ
- Average humidity in December: 76%
The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is August (72%).
Average rainfall in December
Clark, NJ
- Average rainfall in December: 0.83"
The wettest month (with the highest rainfall) is July (1.22").
The driest month (with the least rainfall) is September (0.39").
Average rainfall days in December
Clark, NJ
- Average rainfall days in December: 7.3 days
The month with the highest number of rainy days is July (12.7 days).
The month with the least rainy days is January (4.9 days).
Average snowfall in December
Clark, NJ
- Average snowfall in December: 0.24"
The month with the highest snowfall is March (0.83").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Clark, NJ
- Average snowfall days in December: 2.8 days
The month with the highest number of snowfall days is February (4.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Clark, 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 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in December
Clark, NJ
- Average sunshine days in December: 21.3 days
The month with the most sunshine days is January (22.6 days).
The month with the least sunshine days is July (14.8 days).
Average UV index in December
Clark, 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
Clark, NJ
- Average cloud cover in December: 47
The months with the most cloud cover are February, March and December (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 30).
Average visibility in December
Clark, 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).
Clark, New Jersey, USA
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