December weather forecast
Heislerville, NJ

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Weather in December

December, the first month of the winter in Heislerville, is also a frosty month, with an average temperature fluctuating between 37.9°F (3.3°C) and 46°F (7.8°C).

Temperature

The arrival of December corresponds with a light shift in temperature, down from a fresh 54.1°F (12.3°C) in November to a frosty 46°F (7.8°C). The temperature in Heislerville during December sees a subtle transition from day to night, averaging a low of 37.9°F (3.3°C).

Humidity

The average relative humidity in December is 76%.

Rainfall

In December, the rain falls for 9.8 days. Throughout December, 1.06" (27mm) of precipitation is accumulated. Throughout the year, in Heislerville, there are 130.8 rainfall days, and 13.23" (336mm) of precipitation is accumulated.

Snowfall

January through March, November and December are months with snowfall. In Heislerville, in December, during 2.5 snowfall days, 0.47" (12mm) of snow is typically accumulated. Throughout the year, there are 13.2 snowfall days, and 1.85" (47mm) of snow is accumulated.

Daylight

With an average of 9h and 30min of daylight, December has the shortest days of the year in Heislerville.
On the first day of the month, sunrise is at 7:01 am and sunset at 4:37 pm. On the last day of December, sunrise is at 7:19 am and sunset at 4:47 pm EST.

Sunshine

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

UV index

January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Heislerville. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. 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. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
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Frequently asked questions

What is the temperature in December in Heislerville?

The high-temperature in Heislerville during December is 46°F (7.8°C) and the low-temperature is 37.9°F (3.3°C). In July, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, is computed to be 86°F (30°C).

What is the average humidity in December in Heislerville?

The average relative humidity in December in Heislerville, New Jersey, is 76%.

How much does it rain in Heislerville in December?

In Heislerville, in December, it is raining for 9.8 days, with typically 1.06" (27mm) of accumulated precipitation.

How many days does it snow in December in Heislerville?

In Heislerville, New Jersey, in December, during 2.5 snowfall days, 0.47" (12mm) of snow is typically accumulated.

What is the month with the shortest days in Heislerville?

December has the shortest days of the year in Heislerville, New Jersey, with an average of 9h and 30min of daylight.

How many hours of daylight does Heislerville have in December?

In December, the average day length in Heislerville, New Jersey, is 9h and 28min.

When is the sunrise / sunset in December in Heislerville?

In December, on the first day of the month, sunrise is at 7:01 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:47 pm EST.

How many hours of sunshine does Heislerville have in December?

In Heislerville, New Jersey, the average sunshine duration in December is 5.2h.

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

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

What is the UV index reading in December in Heislerville?

The average daily maximum UV index in December in Heislerville is 2. A UV Index reading of 2, and below, represents a low health risk 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
Heislerville, NJ

Average temperature in December - Heislerville, NJ
  • Average high temperature in December: 46°F

The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (40.1°F).

  • Average low temperature in December: 37.9°F

The month with the highest average low temperature is July (72.1°F).
The coldest month (with the lowest average low temperature) is January (31.3°F).

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Average pressure in December
Heislerville, NJ

Average pressure in December - Heislerville, 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).

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Average wind speed in December
Heislerville, NJ

Average wind speed in December - Heislerville, NJ
  • Average wind speed in December: 11.4mph

The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest months (with the lowest average wind speed) are July and August (8.1mph).

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Average humidity in December
Heislerville, NJ

Average humidity in December - Heislerville, NJ
  • Average humidity in December: 76%

The month with the highest relative humidity is May (81%).
The month with the lowest relative humidity is November (73%).

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Average rainfall in December
Heislerville, NJ

Average rainfall in December - Heislerville, NJ
  • Average rainfall in December: 1.06"

The wettest month (with the highest rainfall) is August (1.61").
The driest month (with the least rainfall) is January (0.67").

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Average rainfall days in December
Heislerville, NJ

Average rainfall days in December - Heislerville, NJ
  • Average rainfall days in December: 9.8 days

The month with the highest number of rainy days is July (15.2 days).
The month with the least rainy days is January (7 days).

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Average snowfall in December
Heislerville, NJ

Average snowfall in December - Heislerville, NJ
  • Average snowfall in December: 0.47"

The month with the highest snowfall is January (0.59").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in December
Heislerville, NJ

Average snowfall days in December - Heislerville, NJ
  • Average snowfall days in December: 2.5 days

The month with the highest number of snowfall days is January (4.7 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

Average daylight in December / Average sunshine in December - Heislerville, NJ
  • Average daylight in December: 9h and 3min

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 30min).

  • Average sunshine in December: 5h and 1min

The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

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Average sunshine days in December
Heislerville, NJ

Average sunshine days in December - Heislerville, NJ
  • Average sunshine days in December: 18.1 days

The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is July (13.4 days).

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Average UV index in December
Heislerville, NJ

Average UV index in December - Heislerville, 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 and December (UV index 2).

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Average cloud cover in December
Heislerville, NJ

Average cloud cover in December - Heislerville, NJ
  • Average cloud cover in December: 44

The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 25).

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Average visibility in December
Heislerville, NJ

Average visibility in December - Heislerville, 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).

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Heislerville, New Jersey, USA

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