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December Weather in Trenton, United States

Last updated: June 24, 2025

In December, the average temperature in Trenton, United States hovers around 10°C (50°F), with a minimum of -7°C (21°F) and a maximum that can reach up to 26°C (79°F). Expect some precipitation, with about 77 mm (3.0 in) over 8 days, and a high average humidity of 87%. Plan accordingly to enjoy the season!

December Temperature in Trenton

In December in Trenton, the average temperature is 10°C (50°F). Maximums can reach 26°C (79°F), while minimums can dip as low as -7°C (21°F). Be prepared for a wide range of temperatures during your visit!

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

The chart illustrates December temperature patterns in Trenton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Trenton, December typically has an average temperature of 10°C (50°F), with highs reaching up to 26°C (79°F) and lows dropping to around -7°C (21°F).
JanFebMarAprMayJunJulAugSepOctNovDec454759637380848378665550
Data source: Temperature data for Trenton 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 Trenton

In Trenton in December, the precipitation amount is 77 mm (3.0 in) distributed over 8 days.

December Precipitation Trends in Trenton

The chart displays monthly precipitation patterns in Trenton, 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 Trenton, December typically receives around 77 mm (3.0 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec711051341621761065597941605977
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Trenton

In Trenton in December humidity is 87%. With an average temperature of 10°C (50°F), this humidity feels like a heavy cloak wrapping around you, making every step feel laborious and the air thick with moisture, challenging your comfort while traveling.

December Average Humidity in Trenton

This chart illustrates the average monthly humidity levels in Trenton, 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 Trenton is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%79%78%78%81%78%73%66%65%72%82%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Trenton

In Trenton in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Trenton for better planning.

Maximum UV Index Levels in Trenton for December

The chart shows the monthly maximum UV Index (UVI) for Trenton 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 Trenton typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111110864
Data source: Trenton 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 Trenton Compares to Other Months

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

This table compares monthly weather conditions in Trenton, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (45°F)71 mm (2.8 inches)80%moderate
February Weather9°C (48°F)105 mm (4.1 inches)79%high
March Weather15°C (59°F)134 mm (5.3 inches)78%very high
April Weather17°C (64°F)162 mm (6.4 inches)78%very high
May Weather23°C (73°F)176 mm (6.9 inches)81%extreme
June Weather27°C (81°F)106 mm (4.2 inches)78%extreme
July Weather29°C (84°F)55 mm (2.2 inches)73%extreme
August Weather28°C (83°F)97 mm (3.8 inches)66%extreme
September Weather25°C (78°F)94 mm (3.7 inches)65%very high
October Weather19°C (66°F)160 mm (6.3 inches)72%very high
November Weather13°C (55°F)59 mm (2.3 inches)82%high
December Weather10°C (50°F)77 mm (3.0 inches)87%moderate

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