December weather forecast
Trenton, NJ

A full aerial view of Trenton, New Jersey, with the George Washington statue
A full aerial view of Trenton, New Jersey, with the George Washington statue

Weather in December

December, the first month of the winter in Trenton, is also a frosty month, with an average temperature fluctuating between 32°F (0°C) and 43.2°F (6.2°C).

Temperature

In Trenton, the average high-temperature in December slightly decreases from a cool 52°F (11.1°C) in November to a chilly 43.2°F (6.2°C). In Trenton, in December, the average low-temperature is 32°F (0°C).

Humidity

In December, the average relative humidity in Trenton, New Jersey, is 77%.

Rainfall

In Trenton, in December, during 11.2 rainfall days, 3.15" (80mm) of precipitation is typically accumulated. In Trenton, during the entire year, the rain falls for 156.8 days and collects up to 31.81" (808mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. In Trenton, snow falls for 3 days, with typically accumulated 1.3" (33mm) of snow. Throughout the year, in Trenton, there are 16.6 snowfall days, and 8.86" (225mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 22min of daylight.
On the first day of the month, sunrise is at 7:02 am and sunset at 4:33 pm. On the last day of December, sunrise is at 7:21 am and sunset at 4:42 pm EST.

Sunshine

In Trenton, the average sunshine in December is 5h.

UV index

The months with the lowest UV index in Trenton are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 2 in December transform into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
[Resources]

FAQ

What is the temperature in December in Trenton?

In December, in Trenton, New Jersey, the average high-temperature is 43.2°F (6.2°C), and the average low-temperature is 32°F (0°C). The average heat index (a.k.a. 'feels like', 'real feel'), which factors the actual air temperature with the relative humidity, in August is appraised at 89.6°F (32°C).

What is the average humidity in December in Trenton?

The average relative humidity in December in Trenton, New Jersey, is 77%.

How much does it rain in Trenton in December?

In Trenton, during December, the rain falls for 11.2 days and regularly aggregates up to 3.15" (80mm) of precipitation.

How many days does it snow in December in Trenton?

In Trenton, New Jersey, during December, snow falls for 3 days and regularly aggregates up to 1.3" (33mm) of snow.

What is the month with the shortest days in Trenton?

December has the shortest days of the year in Trenton, New Jersey, with an average of 9h and 22min of daylight.

What is the average length of the day in December in Trenton?

The average day length in December is 9h and 22min.

What time are sunrise and sunset in December in Trenton?

In December, on the first day of the month, sunrise is at 7:02 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:42 pm EST.

How long on average sun shines in December in Trenton?

In Trenton, the average sunshine duration in December is 5h.

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

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 reading in December in Trenton?

The average daily maximum UV index in December in Trenton, New Jersey, is 2. A UV Index value of 2, and less, symbolizes 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
Trenton, NJ

Average temperature in December - Trenton, NJ
  • Average high temperature in December: 43.2°F

The warmest month (with the highest average high temperature) is July (85.1°F).
The month with the lowest average high temperature is January (36.9°F).

  • Average low temperature in December: 32°F

The month with the highest average low temperature is July (67.3°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).

[Resources]

Average pressure in December
Trenton, NJ

Average pressure in December - Trenton, NJ
  • Average pressure in December: 30.09"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).

[Resources]

Average wind speed in December
Trenton, NJ

Average wind speed in December - Trenton, NJ
  • Average wind speed in December: 7.7mph

The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

[Resources]

Average humidity in December
Trenton, NJ

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

The months with the highest relative humidity are February and October (78%).
The month with the lowest relative humidity is April (72%).

[Resources]

Average rainfall in December
Trenton, NJ

Average rainfall in December - Trenton, NJ
  • Average rainfall in December: 3.15"

The wettest month (with the highest rainfall) is July (3.74").
The driest month (with the least rainfall) is January (1.85").

[Resources]

Average rainfall days in December
Trenton, NJ

Average rainfall days in December - Trenton, NJ
  • Average rainfall days in December: 11.2 days

The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is January (7.9 days).

[Resources]

Average snowfall in December
Trenton, NJ

Average snowfall in December - Trenton, NJ
  • Average snowfall in December: 1.3"

The month with the highest snowfall is March (2.72").
The months with the least snowfall are June, July, August and September (0").

[Resources]

Average snowfall days in December
Trenton, NJ

Average snowfall days in December - Trenton, NJ
  • Average snowfall days in December: 3 days

The month with the highest number of snowfall days is January (4.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

[Resources]

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

Average daylight in December / Average sunshine in December - Trenton, NJ
  • Average daylight in December: 9h and 22min

The month with the longest days is June (Average daylight: 14h and 59min).
The month with the shortest days is December (Average daylight: 9h and 22min).

  • 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).

[Resources]

Average sunshine days in December
Trenton, NJ

Average sunshine days in December - Trenton, NJ
  • Average sunshine days in December: 18.1 days

The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is July (9.3 days).

[Resources]

Average UV index in December
Trenton, NJ

Average UV index in December - Trenton, NJ
  • Average UV index in December: 2

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

[Resources]

Average cloud cover in December
Trenton, NJ

Average cloud cover in December - Trenton, 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 32).

[Resources]

Average visibility in December
Trenton, NJ

Average visibility in December - Trenton, 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).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location