December weather forecast
Island Heights, NJ

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Weather in December

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

Temperature

The transition into December involves a small decrease in the average high-temperature, dipping slightly from a cool 53.1°F (11.7°C) in November to a chilly 45°F (7.2°C). December's average low-temperature is a cold 36.1°F (2.3°C), reflecting a minor difference from the day's peak temperatures.

Humidity

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

Rainfall

In Island Heights, during December, the rain falls for 9.6 days and regularly aggregates up to 1.5" (38mm) of precipitation. Throughout the year, there are 129.4 rainfall days, and 15.31" (389mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through March, November and December. The month with the most snowfall is December, when snow falls for 2.8 days and typically aggregates up to 0.75" (19mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9h and 24min of daylight.
On the first day of December, sunrise is at 6:59 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:41 pm EST.

Sunshine

The average sunshine in December 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. A UV Index value of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for the average person.
Note: The maximum UV index of 2 during December translates into these guidelines:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Updated: Aug 17, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are December temperatures?

The average high-temperature, in December, in Island Heights, is 45°F (7.2°C), while the average low-temperature is 36.1°F (2.3°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which factors the actual air temperature with the relative humidity, in July is calculated to be 86°F (30°C).

What is the average humidity in December?

In December, the average relative humidity is 77%.

How many days does it rain in December?

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

What is the snowiest month in Island Heights?

The month with the most snowfall is December, when snow falls for 2.8 days and typically aggregates up to 0.75" (19mm) of snow.

How many days does it snow in December?

In Island Heights, in December, snow falls for 2.8 days, with typically accumulated 0.75" (19mm) of snow.

What is the month with the shortest days?

With an average of 9h and 24min of daylight, December has the shortest days of the year.

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

In December, the average day length in Island Heights is 9h and 23min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 6:59 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:41 pm EST.

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

In Island Heights, the average sunshine duration in December is 5.1h.

When is the lowest UV index?

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

What is the UV index reading in December?

In Island Heights, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from unsafe 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
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).

Average pressure in December
Island Heights, NJ

Average pressure in December - Island Heights, 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).

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).

Average humidity in December
Island Heights, NJ

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

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

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").

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).

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

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).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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: 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 24min).

  • Average sunshine in December: 5h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).

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).

Average UV index in December
Island Heights, NJ

Average UV index in December - Island Heights, 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, November and December (UV index 2).

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).
The months with the least cloud cover are July and August (Cloud cover 28).

Average visibility in December
Island Heights, NJ

Average visibility in December - Island Heights, 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).

Island Heights, New Jersey, USA

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