December weather forecast
Clayton, NJ

Weather in December

December, the first month of the winter, in Clayton, is still a chilly month, with average temperature ranging between min 32.9°F (0.5°C) and max 44.2°F (6.8°C).

Temperature

In Clayton, the average high-temperature in December drops, from a fresh 53.4°F (11.9°C) in November, to a frosty 44.2°F (6.8°C). In December, in Clayton, New Jersey, the average low-temperature is 32.9°F (0.5°C).

Humidity

The average relative humidity in December is 77%.

Rainfall

December is the month with the most rainfall. Rain falls for 11 days and accumulates 3.35" (85mm) of precipitation.

Snowfall

Months with snowfall in Clayton are January through May, November and December. In Clayton, in December, snow falls for 3 days, with typically accumulated 1.26" (32mm) of snow. Throughout the year, in Clayton, there are 17.8 snowfall days, and 10.28" (261mm) of snow is accumulated.

Daylight

With an average of 9.4h of daylight, December has the shortest days of the year in Clayton.

Sunshine

In Clayton, the average sunshine in December is 5.2h.

UV index

Months with the lowest UV index in Clayton are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from unsafe exposure to the UV radiation for ordinary individuals.
Note: The average daily UV index of 2 transform into the following instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in December in Clayton?

The average relative humidity in December in Clayton is 77%.

What is the wettest month in Clayton?

December is the month with the most rainfall in Clayton, New Jersey. Rain falls for 11 days and accumulates 3.35" (85mm) of precipitation.

How many days does it rain in December in Clayton?

In December, in Clayton, the rain falls for 11 days. Throughout December, 3.35" (85mm) of precipitation is accumulated.

How many days does it snow in December in Clayton?

In Clayton, in December, snow falls for 3 days, with typically accumulated 1.26" (32mm) of snow.

What is the month with the shortest days in Clayton?

With an average of 9.4h of daylight, December has the shortest days of the year in Clayton.

How many hours of daylight does Clayton have in December?

In December, the average length of the day in Clayton is 9.4h.

How many hours of sunshine does Clayton have in December?

In Clayton, the average sunshine in December is 5.2h.

When is the lowest UV index in Clayton?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Clayton, New Jersey.

What is the UV index reading in December in Clayton?

The average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV radiation.

Average temperature in December
Clayton, NJ

Average temperature in December - Clayton, NJ
  • Average high temperature in December: 44.2°F

The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is January (38.1°F).

  • Average low temperature in December: 32.9°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 (26.8°F).

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Average pressure in December
Clayton, NJ

Average pressure in December - Clayton, NJ
  • Average pressure in December: 30.09"

The month with the highest atmospheric pressure is November (30.12").
The month with the lowest atmospheric pressure is June (29.94").

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Average wind speed in December
Clayton, NJ

Average wind speed in December - Clayton, NJ
  • Average wind speed in December: 7.8mph

The windiest month (with the highest average wind speed) is April (8.7mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).

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Average humidity in December
Clayton, NJ

Average humidity in December - Clayton, 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 (71%).

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Average rainfall in December
Clayton, NJ

Average rainfall in December - Clayton, NJ
  • Average rainfall in December: 3.35"

The wettest month (with the highest rainfall) is December (3.35").
The driest month (with the least rainfall) is September (1.73").

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Average rainfall days in December
Clayton, NJ

Average rainfall days in December - Clayton, NJ
  • Average rainfall days in December: 11 days

The month with the highest number of rainy days is July (16.9 days).
The month with the least rainy days is January (8.8 days).

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Average snowfall in December
Clayton, NJ

Average snowfall in December - Clayton, NJ
  • Average snowfall in December: 1.26"

The month with the highest snowfall is March (3.54").
Months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in December
Clayton, NJ

Average snowfall days in December - Clayton, NJ
  • Average snowfall days in December: 3 days

The month with the highest number of snowfall days is January (5.5 days).
Months with the least snowfall days are June, July, August, September and October (0 days).

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Average daylight in December /
Average sunshine in December
Clayton, NJ

Average daylight in December / Average sunshine in December - Clayton, NJ
  • Average daylight in December: 9.4h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in December: 5.2h

The month with the most sunshine is July (Average sunshine: 10.8h).
The month with the least sunshine is February (Average sunshine: 4.9h).

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Average sunshine days in December
Clayton, NJ

Average sunshine days in December - Clayton, NJ
  • Average sunshine days in December: 17.9 days

The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (11.8 days).

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Average UV index in December
Clayton, NJ

Average UV index in December - Clayton, NJ
  • Average UV index in December: 2

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in December
Clayton, NJ

Average cloud cover in December - Clayton, NJ
  • Average cloud cover in December: 45

Months with the most cloud cover are February and March (Cloud cover 46).
Months with the least cloud cover are July and August (Cloud cover 30).

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Average visibility in December
Clayton, NJ

Average visibility in December - Clayton, NJ
  • Average visibility in December: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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