December weather forecast
Hawthorne, NJ

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Weather in December

December, the first month of the winter in Hawthorne, is also an icy month, with an average temperature ranging between max 41°F (5°C) and min 30.9°F (-0.6°C).

Temperature

Setting in of December comes with a decrease in the average high-temperature, moving from a cool 50.5°F (10.3°C) in November to an icy 41°F (5°C). The average nighttime temperature lowers to a freezing cold 30.9°F (-0.6°C) throughout December.

Humidity

The months with the highest humidity are February and December, with an average relative humidity of 77%.

Rainfall

In Hawthorne, in December, during 9.3 rainfall days, 1.57" (40mm) of precipitation is typically accumulated. Throughout the year, in Hawthorne, there are 132.4 rainfall days, and 15.63" (397mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, October through December. In Hawthorne, New Jersey, in December, snow falls for 3.4 days, with typically accumulated 1.06" (27mm) of snow. Throughout the year, there are 18.9 snowfall days, and 5.08" (129mm) of snow is accumulated.

Daylight

With an average of 9h and 18min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:02 am and sunset at 4:29 pm. On the last day of December, sunrise is at 7:21 am and sunset at 4:38 pm EST.

Sunshine

In Hawthorne, the average sunshine in December is 4.9h.

UV index

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for the ordinary person.
Note: In December, the maximum UV index of 2 translates into these guidelines:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.

Frequently asked questions

Is it cold during December?

The high-temperature during December is 41°F (5°C) and the low-temperature is 30.9°F (-0.6°C). In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, is evaluated at 87.8°F (31°C).

What is the most humid month?

The months with the highest humidity are February and December, with an average relative humidity of 77%.

What is the average humidity in December?

The average relative humidity in December is 77%.

How much does it rain in Hawthorne in December?

In Hawthorne, New Jersey, during December, the rain falls for 9.3 days and regularly aggregates up to 1.57" (40mm) of precipitation.

How many days does it snow in December?

In Hawthorne, in December, snow falls for 3.4 days, with typically accumulated 1.06" (27mm) of snow.

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 Hawthorne have in December?

In December, the average day length is 9h and 17min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:02 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:38 pm EST.

How many hours of sunshine does Hawthorne have in December?

In December, the average sunshine duration is 4.9h.

What is the month with the lowest UV index in Hawthorne?

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

What is the UV index intensity in December?

The average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health 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
Hawthorne, NJ

Average temperature in December - Hawthorne, NJ
  • Average high temperature in December: 41°F

The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (35.2°F).

  • Average low temperature in December: 30.9°F

The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (23.9°F).

Average pressure in December
Hawthorne, NJ

Average pressure in December - Hawthorne, 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
Hawthorne, NJ

Average wind speed in December - Hawthorne, NJ
  • Average wind speed in December: 7.9mph

The windiest months (with the highest average wind speed) are January and March (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.6mph).

Average humidity in December
Hawthorne, NJ

Average humidity in December - Hawthorne, NJ
  • Average humidity in December: 77%

The months with the highest relative humidity are February and December (77%).
The month with the lowest relative humidity is August (70%).

Average rainfall in December
Hawthorne, NJ

Average rainfall in December - Hawthorne, NJ
  • Average rainfall in December: 1.57"

The wettest month (with the highest rainfall) is July (2.01").
The driest month (with the least rainfall) is February (0.83").

Average rainfall days in December
Hawthorne, NJ

Average rainfall days in December - Hawthorne, NJ
  • Average rainfall days in December: 9.3 days

The month with the highest number of rainy days is July (15.1 days).
The month with the least rainy days is January (6.5 days).

Average snowfall in December
Hawthorne, NJ

Average snowfall in December - Hawthorne, NJ
  • Average snowfall in December: 1.06"

The month with the highest snowfall is March (1.65").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Hawthorne, NJ

Average snowfall days in December - Hawthorne, NJ
  • Average snowfall days in December: 3.4 days

The month with the highest number of snowfall days is February (5.2 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
Hawthorne, NJ

Average daylight in December / Average sunshine in December - Hawthorne, 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 5min

The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

Average sunshine days in December
Hawthorne, NJ

Average sunshine days in December - Hawthorne, NJ
  • Average sunshine days in December: 19.1 days

The month with the most sunshine days is November (21.2 days).
The month with the least sunshine days is July (13.8 days).

Average UV index in December
Hawthorne, NJ

Average UV index in December - Hawthorne, 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
Hawthorne, NJ

Average cloud cover in December - Hawthorne, NJ
  • Average cloud cover in December: 48

The months with the most cloud cover are February, March and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 31).

Average visibility in December
Hawthorne, NJ

Average visibility in December - Hawthorne, 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).

Hawthorne, New Jersey, USA

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