December Weather in Newark, United States

Last updated: June 24, 2025

In December, the average temperature in Newark, United States hovers around 7°C (45°F), but be prepared for a range of conditions: temperatures can dip as low as -11°C (13°F) or soar up to 25°C (77°F). Expect 102 mm (4.0 in) of precipitation spread over 9 days, contributing to an average humidity of 88%. Stay adaptable and dress accordingly to enjoy everything this month has to offer!

December Temperature in Newark

In December in Newark, the average temperature is 7°C (45°F). Maximum temperatures can reach 25°C (77°F) and minimum temperatures can be as low as -11°C (13°F). Be prepared for a wide range of temperatures, ensuring you pack appropriately for both warm and chilly conditions while traveling.

December Weather in Newark: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Newark, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Newark, December typically has an average temperature of 7°C (45°F), with highs reaching up to 25°C (77°F) and lows dropping to around -11°C (13°F).

Data source: Temperature data for Newark generated using information from the Copernicus Climate Change Service.

December Precipitation in Newark

In Newark in December, the total precipitation amount is 102 mm (4.0 in) over a span of 9 days.

December Precipitation Trends in Newark

The chart displays monthly precipitation patterns in Newark, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Newark, December typically receives around 102 mm (4.0 inches) of precipitation spread over approximately 9 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

December Humidity in Newark

In Newark in December humidity is 88%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable as you navigate through a heavy, thick atmosphere that clings to your skin.

December Average Humidity in Newark

This chart illustrates the average monthly humidity levels in Newark, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Newark is approximately 88%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Newark

In Newark in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Newark, you can check the information here.

Maximum UV Index Levels in Newark for December

The chart shows the monthly maximum UV Index (UVI) for Newark in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Newark typically reaches 3, which falls under the moderate exposure category.

Data source: Newark December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How December Weather in Newark Compares to Other Months

Weather in Newark varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Newark, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Newark, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (40°F)	86 mm (3.4 inches)	84%	moderate
February Weather	6°C (43°F)	142 mm (5.6 inches)	83%	high
March Weather	12°C (53°F)	147 mm (5.8 inches)	81%	very high
April Weather	15°C (60°F)	157 mm (6.2 inches)	81%	very high
May Weather	21°C (70°F)	160 mm (6.3 inches)	83%	extreme
June Weather	25°C (78°F)	87 mm (3.4 inches)	83%	extreme
July Weather	27°C (82°F)	103 mm (4.0 inches)	81%	extreme
August Weather	26°C (79°F)	119 mm (4.7 inches)	74%	very high
September Weather	24°C (75°F)	85 mm (3.4 inches)	71%	very high
October Weather	17°C (63°F)	112 mm (4.4 inches)	76%	high
November Weather	9°C (49°F)	76 mm (3.0 inches)	84%	moderate
December Weather	7°C (45°F)	102 mm (4.0 inches)	88%	moderate