Trenton
New Jersey, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
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
December, the first month of the winter, in Trenton, is still a chilly month, with average temperature ranging between max 43.2°F (6.2°C) and min 27.7°F (-2.4°C).

Temperature

In Trenton, New Jersey, the average high-temperature decreases, from a fresh 54.5°F (12.5°C) in November, to a chilly 43.2°F (6.2°C). The average low-temperature, in Trenton, is 27.7°F (-2.4°C).

Rainfall

In Trenton, it is raining for 11 days, with typically 3.7" (94mm) of accumulated precipitation. In Trenton, during the entire year, the rain falls for 118 days and collects up to 46.4" (1179.7mm) of precipitation.

Daylight

December has the shortest days of the year, with an average of 9.4h of daylight.

Sunshine

December has the least sunshine of the year, with an average of 4.5h of sunshine.

UV index

January, 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 minimal health hazard from unprotected exposure to the Sun's UV rays for the average person.
In December, the average maximum UV index of 2 translate into the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for 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.

What is the temperature in December in Trenton?

The average high-temperature, in December, is 43.2°F (6.2°C), while the average low-temperature is 27.7°F (-2.4°C).

How many days does it rain in December in Trenton?

In Trenton, New Jersey, in December, it is raining for 11 days, with typically 3.7" (94mm) of accumulated precipitation.

What is the month with the shortest days in Trenton?

With an average of 9.4h of daylight, December has the shortest days of the year.

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

In Trenton, New Jersey, the average length of the day in December is 9.4h.

What is the month with the least sunshine in Trenton?

December has the least sunshine of the year in Trenton, with an average of 4.5h of sunshine.

How long on average sun shines in December in Trenton?

In December, the average sunshine is 4.5h.

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

January, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Trenton, New Jersey.

What is the UV index reading in December in Trenton?

In December, the average daily maximum UV index in Trenton, New Jersey, is 2. A UV Index value of 2, and less, symbolizes a low health threat from unsafe exposure to the Sun's UV rays.
Average temperature in December - Trenton, NJ
  • Average high temperature in December: 43.1°F

The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is January (39°F).

  • Average low temperature in December: 27.6°F

The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).

Average rainfall in December - Trenton, NJ
  • Average rainfall in December: 3.7"

The wettest month (with the highest rainfall) is July (5").
The driest month (with the lowest rainfall) is February (2.3").

Average rainfall days in December - Trenton, NJ
  • Average rainfall days in December: 11 days

Months with the highest number of rainy days are March, April, May and December (11 days).
Months with the lowest number of rainy days are September and October (8 days).

Average daylight in December / Average sunshine in December - Trenton, NJ
  • Average daylight in December: 9.4h

The month with the longest days is June (Average daylight: 15h).
The month with shortest days is December (Average daylight: 9.4h).

  • Average sunshine in December: 4.5h

The month with most sunshine is June (Average sunshine: 8.8h).
The month with least sunshine is December (Average sunshine: 4.5h).

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

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January, November and December (UV index 2).