December weather forecast
Schooley's Mountain, NJ

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Weather in December

December, the first month of the winter in Schooley's Mountain, is also a wintry month, with an average temperature fluctuating between 40.1°F (4.5°C) and 28.6°F (-1.9°C).

Temperature

The start of December signals a decrease in the average high-temperature, transitioning from a frosty 49.6°F (9.8°C) in November to a cold 40.1°F (4.5°C). In Schooley's Mountain, the average low-temperature during the month of December is a subzero cold 28.6°F (-1.9°C).

Humidity

The average relative humidity in December is 80%.

Rainfall

In December, in Schooley's Mountain, the rain falls for 12 days. Throughout December, 2.76" (70mm) of precipitation is accumulated. Throughout the year, there are 161.9 rainfall days, and 28.78" (731mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In Schooley's Mountain, New Jersey, in December, during 5 snowfall days, 2.09" (53mm) of snow is typically accumulated. Throughout the year, there are 30.8 snowfall days, and 14.21" (361mm) 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 December in Schooley's Mountain, New Jersey, sunrise is at 7:04 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:41 pm EST.

Sunshine

The average sunshine in December in Schooley's Mountain, New Jersey, 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 Schooley's Mountain. A UV Index estimate of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for the average person.
Note: A maximum high daily UV index of 2 during December translates into the following directions:
While many people can endure lengthy sun exposure, it remains imperative to safeguard babies, children, and fair-skinned individuals. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
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Frequently asked questions

How cold is it in Schooley's Mountain in December?

The high-temperature, in December, in Schooley's Mountain, is 40.1°F (4.5°C), while the low-temperature averages to 28.6°F (-1.9°C). In August, the average heat index (a.k.a. 'feels like', 'real feel'), which calculates the temperature value influenced by the moisture in the air, is calculated to be 87.8°F (31°C).

What is the average humidity in December in Schooley's Mountain?

In December, the average relative humidity in Schooley's Mountain, New Jersey, is 80%.

How many days does it rain in December in Schooley's Mountain?

In Schooley's Mountain, New Jersey, in December, it is raining for 12 days, with typically 2.76" (70mm) of accumulated precipitation.

How many days does it snow in December in Schooley's Mountain?

In Schooley's Mountain, during December, snow falls for 5 days and regularly aggregates up to 2.09" (53mm) of snow.

What is the month with the shortest days in Schooley's Mountain?

December has the shortest days of the year in Schooley's Mountain, with an average of 9h and 18min of daylight.

How many hours of daylight does Schooley's Mountain have in December?

The average day length in December is 9h and 18min.

When are sunrise and sunset in December in Schooley's Mountain?

In December, on the first day of the month, sunrise is at 7:04 am and sunset at 4:32 pm. On the last day of the month, in Schooley's Mountain, sunrise is at 7:23 am and sunset at 4:41 pm EST.

How many hours of sunshine does Schooley's Mountain have in December?

The average sunshine duration in December in Schooley's Mountain is 4.8h.

What are the months with the lowest UV index in Schooley's Mountain?

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.

What is the UV index intensity in December in Schooley's Mountain?

In December, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a low health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Schooley's Mountain, NJ

Average temperature in December - Schooley
  • Average high temperature in December: 40.1°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 (34°F).

  • Average low temperature in December: 28.6°F

The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).

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Average pressure in December
Schooley's Mountain, NJ

Average pressure in December - Schooley
  • 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).

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Average wind speed in December
Schooley's Mountain, NJ

Average wind speed in December - Schooley
  • 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 (4.8mph).

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Average humidity in December
Schooley's Mountain, NJ

Average humidity in December - Schooley
  • Average humidity in December: 80%

The months with the highest relative humidity are February and October (81%).
The month with the lowest relative humidity is April (75%).

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Average rainfall in December
Schooley's Mountain, NJ

Average rainfall in December - Schooley
  • Average rainfall in December: 2.76"

The wettest month (with the highest rainfall) is July (2.95").
The driest month (with the least rainfall) is September (1.54").

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Average rainfall days in December
Schooley's Mountain, NJ

Average rainfall days in December - Schooley
  • Average rainfall days in December: 12 days

The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is January (8.3 days).

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Average snowfall in December
Schooley's Mountain, NJ

Average snowfall in December - Schooley
  • Average snowfall in December: 2.09"

The month with the highest snowfall is February (3.78").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Schooley's Mountain, NJ

Average snowfall days in December - Schooley
  • Average snowfall days in December: 5 days

The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Schooley's Mountain, NJ

Average daylight in December / Average sunshine in December - Schooley
  • 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 5min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days in December
Schooley's Mountain, NJ

Average sunshine days in December - Schooley
  • Average sunshine days in December: 16 days

The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is June (11.5 days).

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Average UV index in December
Schooley's Mountain, NJ

Average UV index in December - Schooley
  • Average UV index in December: 2

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in December
Schooley's Mountain, NJ

Average cloud cover in December - Schooley
  • Average cloud cover in December: 49

The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 34).

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Average visibility in December
Schooley's Mountain, NJ

Average visibility in December - Schooley
  • Average visibility in December: 6mi

The months with the highest visibility are April, November and December (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September and October (5mi).

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Schooley's Mountain, New Jersey, USA

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