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December Weather in Gloucester, United States

Last updated: June 24, 2025

In Gloucester, United States during December, the average temperature hovers around 13°C (56°F), with minimums dipping to 1°C (34°F) and soaring to a pleasant 21°C (71°F). Expect around 149 mm (5.8 in) of precipitation over 11 days, contributing to a notably high average humidity of 84%. Stay prepared for a mix of cool and damp days!

December Temperature in Gloucester

In December in Gloucester, the average temperature is 13°C (56°F). Maximums can reach 21°C (71°F), and minimums can be as low as 1°C (34°F). This climate makes Gloucester a comfortable destination for travelers seeking mild weather and outdoor activities.

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

The chart illustrates December temperature patterns in Gloucester, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Gloucester, December typically has an average temperature of 13°C (56°F), with highs reaching up to 21°C (71°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec515456637177808077716156
Data source: Temperature data for Gloucester 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 Gloucester

In Gloucester in December, the precipitation amount is 149 mm (5.8 in) over the course of 11 days.

December Precipitation Trends in Gloucester

The chart displays monthly precipitation patterns in Gloucester, 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 Gloucester, December typically receives around 149 mm (5.8 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec861408510510914516219420293117149
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Gloucester

In Gloucester in December, humidity is 84%. With an average temperature of 13°C (56°F), this humidity feels like a damp blanket wrapping around you, making it feel cooler and more uncomfortable for traveling, as the air clings to your skin and weighs you down with a sense of heaviness.

December Average Humidity in Gloucester

This chart illustrates the average monthly humidity levels in Gloucester, 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 Gloucester is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%81%80%80%81%82%83%83%80%80%83%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Gloucester

In Gloucester 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 Gloucester for better planning.

Maximum UV Index Levels in Gloucester for December

The chart shows the monthly maximum UV Index (UVI) for Gloucester 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 Gloucester typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111109854
Data source: Gloucester 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 Gloucester Compares to Other Months

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

This table compares monthly weather conditions in Gloucester, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (52°F)86 mm (3.4 inches)84%moderate
February Weather12°C (55°F)140 mm (5.5 inches)81%high
March Weather14°C (57°F)85 mm (3.3 inches)80%very high
April Weather17°C (64°F)104 mm (4.1 inches)80%very high
May Weather22°C (71°F)109 mm (4.3 inches)81%extreme
June Weather25°C (77°F)145 mm (5.7 inches)82%extreme
July Weather27°C (81°F)162 mm (6.4 inches)83%extreme
August Weather27°C (80°F)194 mm (7.6 inches)82%very high
September Weather25°C (78°F)202 mm (7.9 inches)80%very high
October Weather22°C (72°F)93 mm (3.7 inches)79%very high
November Weather16°C (61°F)117 mm (4.6 inches)83%moderate
December Weather13°C (56°F)149 mm (5.8 inches)84%moderate

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