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
December's arrival signals a moderate reduction in the average high-temperature, easing from a cool 54.1°F (12.3°C) in November to a chilly 46°F (7.8°C). In Clarks Mill, an average nighttime temperature of 36.5°F (2.5°C) is expected during December.Humidity
In December, the average relative humidity in Clarks Mill is 76%.Rainfall
In December, in Clarks Mill, the rain falls for 10.1 days. Throughout December, 2.8" (71mm) of precipitation is accumulated. In Clarks Mill, New Jersey, during the entire year, the rain falls for 144.2 days and collects up to 27.48" (698mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Clarks Mill, in December, snow falls for 2.1 days, with typically accumulated 0.94" (24mm) of snow. Throughout the year, there are 12.6 snowfall days, and 5.79" (147mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 24min of daylight.On the first day of December, sunrise is at 6:59 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:44 pm EST.
Sunshine
The average sunshine in December is 5.1h.UV index
The months with the lowest UV index are January, February and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 2 during December translates into the following guidance:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Frequently asked questions
What are the temperatures in Clarks Mill in December?
What is the average humidity in December in Clarks Mill?
How much does it rain in Clarks Mill in December?
How many days does it snow in December in Clarks Mill?
What is the month with the shortest days in Clarks Mill?
How many hours of daylight does Clarks Mill have in December?
When is the sunrise / sunset in December in Clarks Mill?
How many hours of sunshine does Clarks Mill have in December?
What is the month with the lowest UV index in Clarks Mill?
How high is the UV index in December in Clarks Mill?
Average temperature in December
Clarks Mill, NJ
- Average high temperature in December: 46°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (39.7°F).
- Average low temperature in December: 36.5°F
The month with the highest average low temperature is July (70.5°F).
The coldest month (with the lowest average low temperature) is January (29.7°F).
Average pressure in December
Clarks Mill, 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 (29.94"Hg).
Average wind speed in December
Clarks Mill, NJ
- Average wind speed in December: 10.1mph
The windiest months (with the highest average wind speed) are January and February (10.6mph).
The calmest month (with the lowest average wind speed) is August (7.2mph).
Average humidity in December
Clarks Mill, NJ
- Average humidity in December: 76%
The months with the highest relative humidity are May and June (79%).
The month with the lowest relative humidity is April (73%).
Average rainfall in December
Clarks Mill, NJ
- Average rainfall in December: 2.8"
The wettest month (with the highest rainfall) is August (2.91").
The driest month (with the least rainfall) is January (1.61").
Average rainfall days in December
Clarks Mill, NJ
- Average rainfall days in December: 10.1 days
The month with the highest number of rainy days is July (16.1 days).
The months with the least rainy days are January and November (8.3 days).
Average snowfall in December
Clarks Mill, NJ
- Average snowfall in December: 0.94"
The month with the highest snowfall is March (1.97").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Clarks Mill, NJ
- Average snowfall days in December: 2.1 days
The month with the highest number of snowfall days is January (3.8 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
Clarks Mill, NJ
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
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
Clarks Mill, NJ
- Average sunshine days in December: 19.2 days
The month with the most sunshine days is November (19.8 days).
The month with the least sunshine days is July (12.3 days).
Average UV index in December
Clarks Mill, 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 and December (UV index 2).
Average cloud cover in December
Clarks Mill, NJ
- Average cloud cover in December: 45
The months with the most cloud cover are February and March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in December
Clarks Mill, 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).
Clarks Mill, New Jersey, USA
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