December weather forecast
Cliffwood, NJ

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Weather in December

December, the first month of the winter in Cliffwood, is also a frosty month, with an average temperature varying between 34.2°F (1.2°C) and 43.5°F (6.4°C).

Temperature

As November shifts into December, a minor alteration in temperatures is observed, with average highs reducing from a fresh 52.3°F (11.3°C) to a frosty 43.5°F (6.4°C). Throughout December, an average low-temperature of 34.2°F (1.2°C) is expected.

Humidity

In December, the average relative humidity is 76%.

Rainfall

In Cliffwood, during December, the rain falls for 10.7 days and regularly aggregates up to 2.8" (71mm) of precipitation. In Cliffwood, during the entire year, the rain falls for 153 days and collects up to 28.7" (729mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall. In Cliffwood, during December, snow falls for 3.1 days and regularly aggregates up to 0.83" (21mm) of snow. Throughout the year, there are 16.9 snowfall days, and 6.34" (161mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 18min of daylight.
On the first day of the month, sunrise is at 7:01 am and sunset at 4:31 pm. On the last day of December, sunrise is at 7:19 am and sunset at 4:40 pm EST.

Sunshine

In Cliffwood, New Jersey, the average sunshine in December is 5h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the ordinary person.
Note: A typical high UV index of 2 in December suggests the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.

Frequently asked questions

How cold does it get in December?

The high-temperature, in December, in Cliffwood, records 43.5°F (6.4°C), while the low-temperature is 34.2°F (1.2°C). In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which represents the influence of relative humidity on air temperature, is calculated to be 86°F (30°C).

What is the average humidity in December in Cliffwood?

The average relative humidity in December is 76%.

How much does it rain in December?

In Cliffwood, during December, the rain falls for 10.7 days and regularly aggregates up to 2.8" (71mm) of precipitation.

How many days does it snow in December in Cliffwood?

In December, it is snowing for 3.1 days. Throughout December, 0.83" (21mm) 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 18min of daylight.

What is the average length of the day in December?

In Cliffwood, the average day length in December is 9h and 20min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 7:01 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:40 pm EST.

How long on average sun shines in December?

In December, the average sunshine duration is 5h.

What are the months with the lowest UV index?

January through March, 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 Cliffwood, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes 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
Cliffwood, NJ

Average temperature in December - Cliffwood, NJ
  • Average high temperature in December: 43.5°F

The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (37°F).

  • Average low temperature in December: 34.2°F

The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (26.4°F).

Average pressure in December
Cliffwood, NJ

Average pressure in December - Cliffwood, 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
Cliffwood, NJ

Average wind speed in December - Cliffwood, NJ
  • Average wind speed in December: 9.8mph

The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).

Average humidity in December
Cliffwood, NJ

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

The months with the highest relative humidity are May and June (77%).
The months with the lowest relative humidity are March, April, August and November (73%).

Average rainfall in December
Cliffwood, NJ

Average rainfall in December - Cliffwood, NJ
  • Average rainfall in December: 2.8"

The wettest month (with the highest rainfall) is July (3.43").
The driest month (with the least rainfall) is January (1.61").

Average rainfall days in December
Cliffwood, NJ

Average rainfall days in December - Cliffwood, NJ
  • Average rainfall days in December: 10.7 days

The month with the highest number of rainy days is July (17.2 days).
The month with the least rainy days is January (8.2 days).

Average snowfall in December
Cliffwood, NJ

Average snowfall in December - Cliffwood, NJ
  • Average snowfall in December: 0.83"

The month with the highest snowfall is March (2.48").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Cliffwood, NJ

Average snowfall days in December - Cliffwood, NJ
  • Average snowfall days in December: 3.1 days

The month with the highest number of snowfall days is January (5 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
Cliffwood, NJ

Average daylight in December / Average sunshine in December - Cliffwood, 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 18min).

  • Average sunshine in December: 5h and 0min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

Average sunshine days in December
Cliffwood, NJ

Average sunshine days in December - Cliffwood, NJ
  • Average sunshine days in December: 17.5 days

The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is July (11.5 days).

Average UV index in December
Cliffwood, NJ

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

Average cloud cover in December
Cliffwood, NJ

Average cloud cover in December - Cliffwood, NJ
  • Average cloud cover in December: 47

The months with the most cloud cover are February, March and December (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 30).

Average visibility in December
Cliffwood, NJ

Average visibility in December - Cliffwood, 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).

Cliffwood, New Jersey, USA

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