December weather forecast
Scotch Plains, NJ

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Weather in December

The first month of the winter, December, is also a wintry month in Scotch Plains, New Jersey, with temperature in the range of an average low of 31.1°F (-0.5°C) and an average high of 42.3°F (5.7°C).

Temperature

As November makes way for December, Scotch Plains's average high-temperature eases from a cool 51.1°F (10.6°C) to a wintry 42.3°F (5.7°C). In December, the temperature drops to an average of 31.1°F (-0.5°C) at night.

Humidity

February, October and December, with an average relative humidity of 78%, are the most humid months in Scotch Plains.

Rainfall

December is the month with the most rainfall. Rain falls for 11.5 days and accumulates 3.19" (81mm) of precipitation.

Snowfall

Months with snowfall in Scotch Plains are January through May, October through December. In Scotch Plains, in December, snow falls for 4.1 days, with typically accumulated 1.46" (37mm) of snow. Throughout the year, there are 25.4 snowfall days, and 10.31" (262mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 18min of daylight.
On the first day of December in Scotch Plains, sunrise is at 7:02 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:40 pm EST.

Sunshine

In December, the average sunshine in Scotch Plains is 4.9h.

UV index

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the ordinary person.
Note: In December, a daily maximum UV index of 2 leads to the following instructions:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
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Frequently asked questions

How cold is it in Scotch Plains in December?

The high-temperature, in December, in Scotch Plains, is 42.3°F (5.7°C), while the low-temperature averages to 31.1°F (-0.5°C). In August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines relative humidity and air temperature, is computed to be 87.8°F (31°C).

What is the most humid month in Scotch Plains?

February, October and December, with an average relative humidity of 78%, are most humid months.

What is the average humidity in December in Scotch Plains?

The average relative humidity in December is 78%.

What is the wettest month in Scotch Plains?

The month with the most rainfall is December, when the rain falls for 11.5 days and typically aggregates up to 3.19" (81mm) of precipitation.

How much does it rain in Scotch Plains in December?

In Scotch Plains, in December, it is raining for 11.5 days, with typically 3.19" (81mm) of accumulated precipitation.

How much does it snow in Scotch Plains in December?

In Scotch Plains, in December, snow falls for 4.1 days, with typically accumulated 1.46" (37mm) of snow.

What is the month with the shortest days in Scotch Plains?

December has the shortest days of the year in Scotch Plains, with an average of 9h and 18min of daylight.

How many hours of daylight does Scotch Plains have in December?

In December, the average day length in Scotch Plains, New Jersey, is 9h and 19min.

What time are sunrise and sunset in December in Scotch Plains?

On the first day of December in Scotch Plains, New Jersey, sunrise is at 7:02 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:40 pm EST.

How long on average sun shines in December in Scotch Plains?

In December, the average sunshine duration in Scotch Plains is 4.9h.

When is the lowest UV index in Scotch Plains?

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

How high is the UV index in December in Scotch Plains?

The average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health from exposure to the Sun's UV radiation.
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
Scotch Plains, NJ

Average temperature in December - Scotch Plains, NJ
  • Average high temperature in December: 42.3°F

The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (36°F).

  • Average low temperature in December: 31.1°F

The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (23.9°F).

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Average pressure in December
Scotch Plains, NJ

Average pressure in December - Scotch Plains, 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).

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Average wind speed in December
Scotch Plains, NJ

Average wind speed in December - Scotch Plains, NJ
  • Average wind speed in December: 8.1mph

The windiest month (with the highest average wind speed) is March (8.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).

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Average humidity in December
Scotch Plains, NJ

Average humidity in December - Scotch Plains, NJ
  • Average humidity in December: 78%

The months with the highest relative humidity are February, October and December (78%).
The months with the lowest relative humidity are April and August (73%).

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Average rainfall in December
Scotch Plains, NJ

Average rainfall in December - Scotch Plains, NJ
  • Average rainfall in December: 3.19"

The wettest month (with the highest rainfall) is December (3.19").
The driest month (with the least rainfall) is September (1.69").

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Average rainfall days in December
Scotch Plains, NJ

Average rainfall days in December - Scotch Plains, NJ
  • Average rainfall days in December: 11.5 days

The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is January (9.5 days).

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Average snowfall in December
Scotch Plains, NJ

Average snowfall in December - Scotch Plains, NJ
  • Average snowfall in December: 1.46"

The month with the highest snowfall is March (3.23").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Scotch Plains, NJ

Average snowfall days in December - Scotch Plains, NJ
  • Average snowfall days in December: 4.1 days

The months with the highest number of snowfall days are January and February (7.3 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
Scotch Plains, NJ

Average daylight in December / Average sunshine in December - Scotch Plains, 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 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days in December
Scotch Plains, NJ

Average sunshine days in December - Scotch Plains, NJ
  • Average sunshine days in December: 15.8 days

The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is June (11.4 days).

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Average UV index in December
Scotch Plains, NJ

Average UV index in December - Scotch Plains, 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).

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Average cloud cover in December
Scotch Plains, NJ

Average cloud cover in December - Scotch Plains, NJ
  • Average cloud cover in December: 48

The months with the most cloud cover are February, March and December (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 32).

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Average visibility in December
Scotch Plains, NJ

Average visibility in December - Scotch Plains, NJ
  • Average visibility in December: 6mi

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

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Scotch Plains, New Jersey, USA

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