December weather forecast
South Mantoloking Beach, NJ

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Weather in December

December, the first month of the winter in South Mantoloking Beach, is also a frosty month, with an average temperature varying between 37°F (2.8°C) and 45°F (7.2°C).

Temperature

A moderate decline in average high-temperatures is noted in December, moving from a cool 52.9°F (11.6°C) in November to a frosty 45°F (7.2°C). Consistently, South Mantoloking Beach reports average nighttime temperatures of 37°F (2.8°C) during December, a marginal step down from its daytime highs.

Humidity

The average relative humidity in December is 76%.

Rainfall

In South Mantoloking Beach, during December, the rain falls for 9.4 days and regularly aggregates up to 1.57" (40mm) of precipitation. Throughout the year, there are 132 rainfall days, and 17.17" (436mm) 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 2.1 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 the month, sunrise is at 6:59 am and sunset at 4:31 pm. On the last day of December, in South Mantoloking Beach, New Jersey, sunrise is at 7:17 am and sunset at 4:41 pm EST.

Sunshine

In South Mantoloking Beach, the average sunshine in December is 5.1h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum daily UV index of 2 in December converts into the following recommendations:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.

Frequently asked questions

What are December temperatures?

The high-temperature during December is 45°F (7.2°C) and the low-temperature is 37°F (2.8°C).

What is the average humidity in December in South Mantoloking Beach?

In South Mantoloking Beach, the average relative humidity in December is 76%.

How many days does it rain in December?

In South Mantoloking Beach, New Jersey, in December, it is raining for 9.4 days, with typically 1.57" (40mm) of accumulated precipitation.

What is the snowiest month?

December is the month with the most snowfall. Snow falls for 2.1 days and accumulates 0.75" (19mm) of snow.

How much does it snow in December?

In December, it is snowing for 2.1 days. Throughout December, 0.75" (19mm) of snow is accumulated.

What is the month with the shortest days?

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

What is the average length of the day in December?

In South Mantoloking Beach, the average day length in December is 9h and 23min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 6:59 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 4:41 pm EST.

How long on average sun shines in December?

In December, the average sunshine duration is 5.1h.

What are the months with the lowest UV index?

The months with the lowest UV index in South Mantoloking Beach are January, February, November and December, with an average maximum UV index of 2.

What is the UV index reading in December?

In South Mantoloking Beach, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a low health risk 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
South Mantoloking Beach, NJ

Average temperature in December - South Mantoloking Beach, NJ
  • Average high temperature in December: 45°F

The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is January (38.8°F).

  • Average low temperature in December: 37°F

The months with the highest average low temperature are July and August (71.2°F).
The coldest month (with the lowest average low temperature) is January (29.8°F).

Average pressure in December
South Mantoloking Beach, NJ

Average pressure in December - South Mantoloking Beach, 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
South Mantoloking Beach, NJ

Average wind speed in December - South Mantoloking Beach, NJ
  • Average wind speed in December: 12.4mph

The windiest month (with the highest average wind speed) is January (13.2mph).
The calmest month (with the lowest average wind speed) is July (8.5mph).

Average humidity in December
South Mantoloking Beach, NJ

Average humidity in December - South Mantoloking Beach, NJ
  • Average humidity in December: 76%

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

Average rainfall in December
South Mantoloking Beach, NJ

Average rainfall in December - South Mantoloking Beach, NJ
  • Average rainfall in December: 1.57"

The wettest month (with the highest rainfall) is July (2.24").
The driest month (with the least rainfall) is January (0.83").

Average rainfall days in December
South Mantoloking Beach, NJ

Average rainfall days in December - South Mantoloking Beach, NJ
  • Average rainfall days in December: 9.4 days

The month with the highest number of rainy days is July (14.9 days).
The month with the least rainy days is January (6.7 days).

Average snowfall in December
South Mantoloking Beach, NJ

Average snowfall in December - South Mantoloking Beach, 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
South Mantoloking Beach, NJ

Average snowfall days in December - South Mantoloking Beach, NJ
  • Average snowfall days in December: 2.1 days

The month with the highest number of snowfall days is January (3.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in December /
Average sunshine in December
South Mantoloking Beach, NJ

Average daylight in December / Average sunshine in December - South Mantoloking Beach, 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
South Mantoloking Beach, NJ

Average sunshine days in December - South Mantoloking Beach, NJ
  • Average sunshine days in December: 18.5 days

The month with the most sunshine days is November (20.3 days).
The month with the least sunshine days is July (13.7 days).

Average UV index in December
South Mantoloking Beach, NJ

Average UV index in December - South Mantoloking Beach, 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
South Mantoloking Beach, NJ

Average cloud cover in December - South Mantoloking Beach, NJ
  • Average cloud cover in December: 47

The months with the most cloud cover are February and December (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 27).

Average visibility in December
South Mantoloking Beach, NJ

Average visibility in December - South Mantoloking Beach, 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).

South Mantoloking Beach, New Jersey, USA

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