December weather forecast and climate
Island Heights, NJ

Weather in December

December, the first month of the winter, in Island Heights, is also a frosty month, with temperature in the range of an average low of 36.1°F (2.3°C) and an average high of 45°F (7.2°C).

Temperature

In Island Heights, the average high-temperature slightly decreases, from a cool 53.1°F (11.7°C) in November, to a chilly 45°F (7.2°C). The average low-temperature, in December, is 36.1°F (2.3°C).

Humidity

In Island Heights, New Jersey, the average relative humidity is 77%.

Rainfall

In Island Heights, during 9.6 rainfall days, 1.5" (38mm) of precipitation is typically accumulated. Throughout the year, there are 129.4 rainfall days, and 15.31" (389mm) of precipitation is accumulated.

Snowfall

January through March, November and December are months with snowfall in Island Heights. December is the month with the most snowfall. Snow falls for 2.8 days and accumulates 0.75" (19mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9.4h of daylight.

Sunshine

In Island Heights, the average sunshine is 5.1h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Island Heights. A UV Index reading of 2, and below, represents a minimal health hazard from the exposure to the Sun's UV rays for the average person.
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 solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in December in Island Heights?

The average high-temperature, in December, in Island Heights, New Jersey, is 45°F (7.2°C), while the average low-temperature is 36.1°F (2.3°C).

What is the average humidity in December in Island Heights?

In Island Heights, New Jersey, the average relative humidity in December is 77%.

How many days does it rain in December in Island Heights?

In Island Heights, New Jersey, in December, it is raining for 9.6 days, with typically 1.5" (38mm) of accumulated precipitation.

How many days does it snow in December in Island Heights?

In December, in Island Heights, New Jersey, it is snowing for 2.8 days. Throughout December, 0.75" (19mm) of snow is accumulated.

What is the snowiest month in Island Heights?

December is the month with the most snowfall in Island Heights, New Jersey. Snow falls for 2.8 days and accumulates 0.75" (19mm) of snow.

What is the month with the shortest days in Island Heights?

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

How many hours of daylight does Island Heights have in December?

In Island Heights, New Jersey, the average length of the day in December is 9.4h.

How many hours of sunshine does Island Heights have in December?

In December, the average sunshine is 5.1h.

What is the month with the lowest UV index in Island Heights?

Months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.

How high is the UV index in December in Island Heights?

In December, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to the UV radiation.

Average temperature in December
Island Heights, NJ

Average temperature in December - Island Heights, NJ
  • Average high temperature in December: 45°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (38.7°F).

  • Average low temperature in December: 36.1°F

The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (28.8°F).

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Average pressure in December
Island Heights, NJ

Average pressure in December - Island Heights, NJ
  • Average pressure in December: 30.08"

The month with the highest atmospheric pressure is November (30.11").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed in December
Island Heights, NJ

Average wind speed in December - Island Heights, NJ
  • Average wind speed in December: 11.1mph

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 (7.8mph).

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Average humidity in December
Island Heights, NJ

Average humidity in December - Island Heights, NJ
  • Average humidity in December: 77%

Months with the highest relative humidity are May and June (80%).
Months with the lowest relative humidity are January, March and November (74%).

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Average rainfall in December
Island Heights, NJ

Average rainfall in December - Island Heights, NJ
  • Average rainfall in December: 1.5"

The wettest month (with the highest rainfall) is July (1.97").
The driest month (with the least rainfall) is January (0.79").

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Average rainfall days in December
Island Heights, NJ

Average rainfall days in December - Island Heights, NJ
  • Average rainfall days in December: 9.6 days

The month with the highest number of rainy days is July (14.3 days).
The month with the least rainy days is January (6.9 days).

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Average snowfall in December
Island Heights, NJ

Average snowfall in December - Island Heights, NJ
  • Average snowfall in December: 0.75"

The month with the highest snowfall is December (0.75").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in December
Island Heights, NJ

Average snowfall days in December - Island Heights, NJ
  • Average snowfall days in December: 2.8 days

The month with the highest number of snowfall days is January (4.3 days).
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
Island Heights, NJ

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

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in December: 5.1h

The month with the most sunshine is July (Average sunshine: 10.7h).
The month with the least sunshine is February (Average sunshine: 4.9h).

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Average sunshine days in December
Island Heights, NJ

Average sunshine days in December - Island Heights, NJ
  • Average sunshine days in December: 17.6 days

The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is July (13.9 days).

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Average UV index in December
Island Heights, NJ

Average UV index in December - Island Heights, NJ
  • Average UV index in December: 2

Months with the highest UV index are 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
Island Heights, NJ

Average cloud cover in December - Island Heights, NJ
  • Average cloud cover in December: 46

The month with the most cloud cover is February (Cloud cover 47).
Months with the least cloud cover are July and August (Cloud cover 28).

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Average visibility in December
Island Heights, NJ

Average visibility in December - Island Heights, 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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