January Weather in Newark, United States

Last updated: June 24, 2025

In January, the average temperature in Newark, United States hovers around -4°C (26°F). Residents can experience extremes, with minimums plunging to -31°C (-24°F) and maximums reaching a mild 15°C (59°F). Prepare for a bit of precipitation as well, with an average of 63 mm (2.5 in) spread over 8 days. The air tends to feel quite damp, with an average humidity of 82%.

January Temperature in Newark

In January in Newark, the average temperature is -4°C (26°F), with maximums reaching 15°C (59°F) and minimums plummeting as low as -31°C (-24°F). Travelers should be prepared for chilly conditions and consider dressing in layers to stay comfortable during their visit.

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

The chart illustrates January 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, January typically has an average temperature of -4°C (26°F), with highs reaching up to 15°C (59°F) and lows dropping to around -31°C (-24°F).

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

January Precipitation in Newark

In Newark in January, the precipitation amount is 63 mm (2.5 in) spread over 8 days.

January Precipitation Trends in Newark

The chart displays monthly precipitation patterns in Newark, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Newark, January typically receives around 63 mm (2.5 inches) of precipitation spread over approximately 8 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Newark

In Newark in January humidity is 82%. With an average temperature of -4°C (26°F), this humidity feels like an icy blanket enveloping you, making every step outside a battle against the chill and dampness—where the cold bites deeper, and the air feels heavy, reminding you that even in the winter, the moisture can be overwhelming for any traveler unprepared for such conditions.

January Average Humidity in Newark

This chart illustrates the average monthly humidity levels in Newark, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Newark is approximately 82%, offering insight into how humid the weather typically is during this month.

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

January UV Index in Newark

In Newark in January, 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 January

The chart shows the monthly maximum UV Index (UVI) for Newark in January, 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 January, the maximum UV index in Newark typically reaches 3, which falls under the moderate exposure category.

Data source: Newark January 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 January 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 January’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 January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (26°F)	63 mm (2.5 inches)	82%	moderate
February Weather	-3°C (28°F)	64 mm (2.5 inches)	83%	moderate
March Weather	5°C (40°F)	90 mm (3.5 inches)	84%	high
April Weather	10°C (50°F)	116 mm (4.6 inches)	85%	very high
May Weather	17°C (62°F)	157 mm (6.2 inches)	79%	very high
June Weather	23°C (73°F)	138 mm (5.4 inches)	82%	very high
July Weather	24°C (76°F)	107 mm (4.2 inches)	80%	very high
August Weather	23°C (73°F)	77 mm (3.0 inches)	81%	very high
September Weather	20°C (69°F)	92 mm (3.6 inches)	80%	very high
October Weather	13°C (55°F)	131 mm (5.2 inches)	82%	high
November Weather	4°C (40°F)	57 mm (2.2 inches)	88%	moderate
December Weather	1°C (33°F)	54 mm (2.1 inches)	84%	low