December weather forecast
Waldwick, NJ

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Weather in December

The first month of the winter, December, is still a cold month in Waldwick, New Jersey, with temperature in the range of an average high of 40.8°F (4.9°C) and an average low of 30.4°F (-0.9°C).

Temperature

Transition from November to December is accompanied by a temperature drop, with average high-temperatures decreasing from a cool 50.7°F (10.4°C) to a cold 40.8°F (4.9°C). Waldwick records an average low-temperature of 30.4°F (-0.9°C) throughout the month of December.

Humidity

February and December, with an average relative humidity of 78%, are the most humid months.

Rainfall

December is the month with the most rainfall. Rain falls for 10.6 days and accumulates 3.58" (91mm) of precipitation.

Snowfall

Months with snowfall are January through April, October through December. In Waldwick, during December, snow falls for 4.5 days and regularly aggregates up to 2.05" (52mm) of snow. Throughout the year, there are 28 snowfall days, and 13.82" (351mm) of snow is accumulated.

Daylight

The month with the shortest days in Waldwick is December, with an average of 9h and 18min of daylight.
On the first day of the month, sunrise is at 7:02 am and sunset at 4:28 pm. On the last day of December, sunrise is at 7:21 am and sunset at 4:38 pm EST.

Sunshine

In Waldwick, the average sunshine in December is 4.7h.

UV index

The months with the lowest UV index in Waldwick are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: In December, the maximum UV index of 2 suggests these recommendations:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.

Frequently asked questions

How cold does it get in December?

The average high-temperature, in December, in Waldwick, is 40.8°F (4.9°C), while the average low-temperature is 30.4°F (-0.9°C). In August, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, is calculated to be 87.8°F (31°C).

What are the most humid months?

February and December, with an average relative humidity of 78%, are most humid months.

What is the average humidity in December?

In December, the average relative humidity is 78%.

What is the wettest month?

The month with the most rainfall is December, when the rain falls for 10.6 days and typically aggregates up to 3.58" (91mm) of precipitation.

How much does it rain in December?

In Waldwick, New Jersey, during December, the rain falls for 10.6 days and regularly aggregates up to 3.58" (91mm) of precipitation.

How many days does it snow in December?

In December, it is snowing for 4.5 days. Throughout December, 2.05" (52mm) of snow is accumulated.

What is the month with the shortest days?

With an average of 9h and 18min of daylight, December has the shortest days of the year.

How many hours of daylight does Waldwick have in December?

The average day length in December is 9h and 17min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:02 am and sunset at 4:28 pm. On the last day of the month, in Waldwick, sunrise is at 7:21 am and sunset at 4:38 pm EST.

How many hours of sunshine does Waldwick have in December?

In December, the average sunshine duration is 4.7h.

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 Waldwick, 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 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
Waldwick, NJ

Average temperature in December - Waldwick, NJ
  • Average high temperature in December: 40.8°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (35.2°F).

  • Average low temperature in December: 30.4°F

The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (22.8°F).

Average pressure in December
Waldwick, NJ

Average pressure in December - Waldwick, NJ
  • Average pressure in December: 30.07"Hg

The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in December
Waldwick, NJ

Average wind speed in December - Waldwick, NJ
  • Average wind speed in December: 7.3mph

The windiest month (with the highest average wind speed) is March (8mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

Average humidity in December
Waldwick, NJ

Average humidity in December - Waldwick, NJ
  • Average humidity in December: 78%

The months with the highest relative humidity are February and December (78%).
The month with the lowest relative humidity is August (70%).

Average rainfall in December
Waldwick, NJ

Average rainfall in December - Waldwick, NJ
  • Average rainfall in December: 3.58"

The wettest month (with the highest rainfall) is December (3.58").
The driest month (with the least rainfall) is September (1.89").

Average rainfall days in December
Waldwick, NJ

Average rainfall days in December - Waldwick, NJ
  • Average rainfall days in December: 10.6 days

The months with the highest number of rainy days are May and July (16.8 days).
The month with the least rainy days is January (8.4 days).

Average snowfall in December
Waldwick, NJ

Average snowfall in December - Waldwick, NJ
  • Average snowfall in December: 2.05"

The month with the highest snowfall is February (4.09").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Waldwick, NJ

Average snowfall days in December - Waldwick, NJ
  • Average snowfall days in December: 4.5 days

The month with the highest number of snowfall days is February (7.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Waldwick, NJ

Average daylight in December / Average sunshine in December - Waldwick, NJ
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in December: 4h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).

Average sunshine days in December
Waldwick, NJ

Average sunshine days in December - Waldwick, NJ
  • Average sunshine days in December: 16.7 days

The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is June (11.5 days).

Average UV index in December
Waldwick, NJ

Average UV index in December - Waldwick, 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
Waldwick, NJ

Average cloud cover in December - Waldwick, NJ
  • Average cloud cover in December: 49

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 34).

Average visibility in December
Waldwick, NJ

Average visibility in December - Waldwick, NJ
  • Average visibility in December: 6mi

The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).

Waldwick, New Jersey, USA

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