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December Weather in Newark, United States

Last updated: June 24, 2025

In Newark, United States, the average temperature in December hovers around 0°C (33°F), with a chilly minimum of -16°C (3°F) and a mild maximum of 19°C (66°F). Prepare for a wet month, as precipitation accumulates to 95 mm (3.7 in) over 16 days. Expect it to feel quite damp, with an average humidity of 86%.

December Temperature in Newark

In December in Newark, the average temperature is 0°C (33°F), with maximums reaching up to 19°C (66°F) and minimums dropping as low as -16°C (3°F). Be prepared for a wide range of weather conditions while traveling during this time.

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 0°C (33°F), with highs reaching up to 19°C (66°F) and lows dropping to around -16°C (3°F).
JanFebMarAprMayJunJulAugSepOctNovDec272935465867737165544032
Data source: Temperature data for Newark generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Newark

In Newark in December, the precipitation amount is 95 mm (3.7 in) spread over 16 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 95 mm (3.7 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec83837611711686151106791478995
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Newark

In Newark in December humidity is 86%. With an average temperature of 0°C (33°F), this humidity feels like a damp chill that permeates your clothes, making traveling uncomfortable and necessitating warm, layered clothing to stay dry and cozy.

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 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%87%88%82%79%78%76%78%84%89%86%
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 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Newark, you can visit Hourly UV Index in Newark.

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 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24681010997532
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.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)83 mm (3.3 inches)90%low
February Weather-2°C (29°F)83 mm (3.3 inches)90%moderate
March Weather2°C (35°F)76 mm (3.0 inches)87%high
April Weather8°C (46°F)117 mm (4.6 inches)88%very high
May Weather15°C (59°F)116 mm (4.6 inches)82%very high
June Weather20°C (68°F)86 mm (3.4 inches)79%very high
July Weather23°C (73°F)151 mm (6.0 inches)78%very high
August Weather22°C (72°F)106 mm (4.2 inches)76%very high
September Weather18°C (65°F)79 mm (3.1 inches)78%high
October Weather12°C (55°F)147 mm (5.8 inches)84%moderate
November Weather4°C (40°F)89 mm (3.5 inches)89%moderate
December Weather0°C (33°F)95 mm (3.7 inches)86%low

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