December weather forecast
Seaside Park, NJ

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Weather in December

The first month of the winter, December, is still a chilly month in Seaside Park, New Jersey, with an average temperature fluctuating between 37.8°F (3.2°C) and 45.1°F (7.3°C).

Temperature

Seaside Park's December weather features a light decline in high-temperatures, reducing from a cool 53.2°F (11.8°C) in November to a chilly 45.1°F (7.3°C). The temperature in Seaside Park during December nights demonstrates a small drop from the daytime highs, settling to an average of 37.8°F (3.2°C).

Humidity

The average relative humidity in December is 76%.

Rainfall

The month with the most rainfall is December, when the rain falls for 11.8 days and typically aggregates up to 3.7" (94mm) of precipitation.

Snowfall

Months with snowfall are January through April, November and December. In Seaside Park, during December, snow falls for 1.9 days and regularly aggregates up to 1.1" (28mm) of snow. Throughout the year, there are 13.1 snowfall days, and 4.65" (118mm) of snow is accumulated.

Ocean temperature

In Seaside Park, the average seawater temperature in December is 48.6°F (9.2°C).
Note: Being in 48.6°F (9.2°C) waters at 55.4°F (13°C) is discomforting, but anything below 50°F (10°C) can jeopardize breathing and induce cold shock, factoring in physical endurance.

Daylight

December has the shortest days of the year in Seaside Park, New Jersey, with an average of 9h and 24min of daylight.
On the first day of December in Seaside Park, 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.

Sunshine

In December, the average sunshine in Seaside Park is 5.1h.

UV index

January through March 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 unprotected exposure to Sun's UV rays for average individuals.
Note: A daily maximum UV index of 2 in December translates into the following instructions:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in Seaside Park in December?

The average high-temperature, in December, in Seaside Park, is 45.1°F (7.3°C), while the average low-temperature is 37.8°F (3.2°C).

What is the average humidity in December in Seaside Park?

The average relative humidity in December in Seaside Park is 76%.

What is the rainiest month in Seaside Park?

The month with the most rainfall in Seaside Park is December, when the rain falls for 11.8 days and typically aggregates up to 3.7" (94mm) of precipitation.

How many days does it rain in December in Seaside Park?

In Seaside Park, in December, it is raining for 11.8 days, with typically 3.7" (94mm) of accumulated precipitation.

How much does it snow in Seaside Park in December?

In Seaside Park, New Jersey, in December, during 1.9 snowfall days, 1.1" (28mm) of snow is typically accumulated.

What is the ocean temperature in December in Seaside Park?

In Seaside Park, New Jersey, in December, the average water temperature is 48.6°F (9.2°C). Swimming in 48.6°F (9.2°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the month with the shortest days in Seaside Park?

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

What is the average length of the day in December in Seaside Park?

The average day length in December in Seaside Park is 9h and 23min.

When is the sunrise / sunset in December in Seaside Park?

On the first day of December in Seaside Park, 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 many hours of sunshine does Seaside Park have in December?

In Seaside Park, New Jersey, the average sunshine duration in December is 5.1h.

When is the lowest UV index in Seaside Park?

The months with the lowest UV index in Seaside Park are January through March and December, with an average maximum UV index of 2.

What is the UV index intensity in December in Seaside Park?

The average daily maximum UV index in December in Seaside Park, New Jersey, is 2. A UV Index 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
Seaside Park, NJ

Average temperature in December - Seaside Park, NJ
  • Average high temperature in December: 45.1°F

The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is January (39°F).

  • Average low temperature in December: 37.8°F

The month with the highest average low temperature is August (71.6°F).
The coldest month (with the lowest average low temperature) is January (30.2°F).

Average pressure in December
Seaside Park, NJ

Average pressure in December - Seaside Park, 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
Seaside Park, NJ

Average wind speed in December - Seaside Park, NJ
  • Average wind speed in December: 12.9mph

The windiest month (with the highest average wind speed) is January (13.5mph).
The calmest month (with the lowest average wind speed) is July (8.8mph).

Average humidity in December
Seaside Park, NJ

Average humidity in December - Seaside Park, NJ
  • Average humidity in December: 76%

The months with the highest relative humidity are May and June (81%).
The months with the lowest relative humidity are January and November (74%).

Average rainfall in December
Seaside Park, NJ

Average rainfall in December - Seaside Park, NJ
  • Average rainfall in December: 3.7"

The wettest month (with the highest rainfall) is December (3.7").
The driest month (with the least rainfall) is January (2.01").

Average rainfall days in December
Seaside Park, NJ

Average rainfall days in December - Seaside Park, NJ
  • Average rainfall days in December: 11.8 days

The month with the highest number of rainy days is July (16.3 days).
The month with the least rainy days is January (9 days).

Average snowfall in December
Seaside Park, NJ

Average snowfall in December - Seaside Park, NJ
  • Average snowfall in December: 1.1"

The month with the highest snowfall is January (1.34").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Seaside Park, NJ

Average snowfall days in December - Seaside Park, NJ
  • Average snowfall days in December: 1.9 days

The month with the highest number of snowfall days is January (4.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature in December
Seaside Park, NJ

Average sea temperature in December - Seaside Park, NJ
  • Average sea temperature in December: 48.5°F

The best month for swimming (with the highest average sea temperature) is August (75.8°F).
The coldest month (with the lowest average sea temperature) is February (40.8°F).

Average daylight in December /
Average sunshine in December
Seaside Park, NJ

Average daylight in December / Average sunshine in December - Seaside Park, 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 48min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).

Average sunshine days in December
Seaside Park, NJ

Average sunshine days in December - Seaside Park, NJ
  • Average sunshine days in December: 15.9 days

The month with the most sunshine days is November (18.2 days).
The month with the least sunshine days is July (13.1 days).

Average UV index in December
Seaside Park, NJ

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

Average cloud cover in December
Seaside Park, NJ

Average cloud cover in December - Seaside Park, NJ
  • Average cloud cover in December: 47

The month with the most cloud cover is February (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 28).

Average visibility in December
Seaside Park, NJ

Average visibility in December - Seaside Park, 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).

Seaside Park, New Jersey, USA

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