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 also a frosty month, with average temperature fluctuating between 27.7°F (-2.4°C) and 43.2°F (6.2°C).

Temperature

In Trenton, the average high-temperature drops, from a cool 54.5°F (12.5°C) in November, to a chilly 43.2°F (6.2°C). In Trenton, in December, the average low-temperature is 27.7°F (-2.4°C).

Rainfall

In Trenton, in December, it is raining for 11 days, with typically 3.7" (94mm) of accumulated precipitation. Throughout the year, in Trenton, there are 118 rainfall days, and 46.4" (1179.7mm) of precipitation is accumulated.

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

Months with the lowest UV index in Trenton are January, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from the exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 2 interpret into the following advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in December in Trenton?

In December, the average high-temperature is 43.2°F (6.2°C), and 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, during 11 rainfall days, 3.7" (94mm) of precipitation is typically accumulated.

What is the month with the shortest days in Trenton?

The month with the shortest days in Trenton is December, with an average of 9.4h of daylight.

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

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

What is the month with the least sunshine in Trenton?

With an average of 4.5h of sunshine, December has the least sunshine of the year in Trenton, New Jersey.

How many hours of sunshine does Trenton have in December?

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.

What is the UV index intensity in December in Trenton?

The average daily maximum UV index in December in Trenton is 2. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to the UV radiation.
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).