December weather forecast
Butler, NJ

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Weather in December

December, the first month of the winter in Butler, is also an icy month, with an average temperature fluctuating between 28.8°F (-1.8°C) and 40.1°F (4.5°C).

Temperature

Stepping into December, Butler observes a temperature decline, with the average high falling from November's chilly 49.3°F (9.6°C) to a cold 40.1°F (4.5°C). In Butler, the average temperature during the nights of December drops to a freezing cold 28.8°F (-1.8°C).

Humidity

The months with the highest humidity are February, October and December, with an average relative humidity of 80%.

Rainfall

In Butler, in December, during 6.9 rainfall days, 0.83" (21mm) of precipitation is typically accumulated. Throughout the year, there are 111.1 rainfall days, and 8.46" (215mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall in Butler. In Butler, New Jersey, during December, snow falls for 3.5 days and regularly aggregates up to 0.51" (13mm) of snow. In Butler, during the entire year, snow falls for 22 days and aggregates up to 3.19" (81mm) of snow.

Daylight

With an average of 9h and 18min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:03 am and sunset at 4:29 pm. On the last day of December, in Butler, sunrise is at 7:22 am and sunset at 4:39 pm EST.

Sunshine

The average sunshine in December in Butler, New Jersey, is 4.6h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for average individuals.
Note: In December, a regular UV index of 2 translates into these guidelines:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
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Frequently asked questions

Is it cold in Butler during December?

In Butler, 40.1°F (4.5°C) is the average high-temperature and 28.8°F (-1.8°C) is the average low-temperature during December. The average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines relative humidity and air temperature, in August is evaluated at 86°F (30°C).

What are the most humid months in Butler?

February, October and December, with an average relative humidity of 80%, are most humid months in Butler, New Jersey.

What is the average humidity in December in Butler?

In December, the average relative humidity in Butler is 80%.

How much does it rain in Butler in December?

In Butler, during December, the rain falls for 6.9 days and regularly aggregates up to 0.83" (21mm) of precipitation.

How many days does it snow in December in Butler?

In Butler, New Jersey, during December, snow falls for 3.5 days and regularly aggregates up to 0.51" (13mm) of snow.

What is the month with the shortest days in Butler?

With an average of 9h and 18min of daylight, December has the shortest days of the year in Butler, New Jersey.

How many hours of daylight does Butler have in December?

In Butler, the average day length in December is 9h and 17min.

When is the sunrise / sunset in December in Butler?

In December, on the first day of the month, sunrise is at 7:03 am and sunset at 4:29 pm. On the last day of the month, in Butler, New Jersey, sunrise is at 7:22 am and sunset at 4:39 pm EST.

How many hours of sunshine does Butler have in December?

The average sunshine duration in December is 4.6h.

What are the months with the lowest UV index in Butler?

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

How high is the UV index in December in Butler?

The average daily maximum UV index in December in Butler, New Jersey, is 2. A UV Index value of 2, and less, symbolizes a low health threat from unprotected exposure to 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
Butler, NJ

Average temperature in December - Butler, NJ
  • 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 (34.3°F).

  • Average low temperature in December: 28.8°F

The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (21.4°F).

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Average pressure in December
Butler, NJ

Average pressure in December - Butler, 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
Butler, NJ

Average wind speed in December - Butler, NJ
  • Average wind speed in December: 7.3mph

The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).

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Average humidity in December
Butler, NJ

Average humidity in December - Butler, NJ
  • Average humidity in December: 80%

The months with the highest relative humidity are February, October and December (80%).
The month with the lowest relative humidity is April (75%).

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Average rainfall in December
Butler, NJ

Average rainfall in December - Butler, NJ
  • Average rainfall in December: 0.83"

The wettest month (with the highest rainfall) is July (1.06").
The driest month (with the least rainfall) is September (0.31").

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Average rainfall days in December
Butler, NJ

Average rainfall days in December - Butler, NJ
  • Average rainfall days in December: 6.9 days

The month with the highest number of rainy days is July (14.3 days).
The month with the least rainy days is January (4.5 days).

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Average snowfall in December
Butler, NJ

Average snowfall in December - Butler, NJ
  • Average snowfall in December: 0.51"

The month with the highest snowfall is March (0.98").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in December
Butler, NJ

Average snowfall days in December - Butler, NJ
  • Average snowfall days in December: 3.5 days

The month with the highest number of snowfall days is January (6.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Butler, NJ
  • 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 4min

The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).

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Average sunshine days in December
Butler, NJ

Average sunshine days in December - Butler, NJ
  • Average sunshine days in December: 21.1 days

The month with the most sunshine days is January (22.3 days).
The month with the least sunshine days is May (13.9 days).

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Average UV index in December
Butler, NJ

Average UV index in December - Butler, 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
Butler, NJ

Average cloud cover in December - Butler, NJ
  • Average cloud cover in December: 51

The months with the most cloud cover are February and March (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 36).

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Average visibility in December
Butler, NJ

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

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

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Butler, New Jersey, USA

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