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December Weather in Newark, United States

Last updated: June 24, 2025

In December, the average temperature in Newark, United States hovers around 1°C (33°F). Expect that temperatures can dip as low as -21°C (-6°F) and rise to a maximum of 19°C (67°F). During the month, anticipate 54 mm (2.1 in) of precipitation spread across approximately 7 days, with an average humidity level of 84%.

December Temperature in Newark

In December in Newark, the average temperature is 1°C (33°F). Maximum temperatures can reach up to 19°C (67°F), while minimums can drop as low as -21°C (-6°F). Be prepared for a wide range of temperatures if you're planning to travel 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 1°C (33°F), with highs reaching up to 19°C (67°F) and lows dropping to around -21°C (-6°F).
JanFebMarAprMayJunJulAugSepOctNovDec252740496273767368553933
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 54 mm (2.1 in) over a duration of 7 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 54 mm (2.1 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec63649011615713810777921315754
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 84%. With an average temperature of 1°C (33°F), this humidity feels like an icy blanket, making travel uncomfortable and breathless as the frigid air clings to your skin and dampens your clothes.

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 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%83%84%85%79%82%80%81%80%82%88%84%
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.
JanFebMarAprMayJunJulAugSepOctNovDec34689101098642
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-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 Weather5°C (40°F)90 mm (3.5 inches)84%high
April Weather10°C (50°F)116 mm (4.6 inches)85%very high
May Weather17°C (62°F)157 mm (6.2 inches)79%very high
June Weather23°C (73°F)138 mm (5.4 inches)82%very high
July Weather24°C (76°F)107 mm (4.2 inches)80%very high
August Weather23°C (73°F)77 mm (3.0 inches)81%very high
September Weather20°C (69°F)92 mm (3.6 inches)80%very high
October Weather13°C (55°F)131 mm (5.2 inches)82%high
November Weather4°C (40°F)57 mm (2.2 inches)88%moderate
December Weather1°C (33°F)54 mm (2.1 inches)84%low

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