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December Weather in New England, United States

Last updated: June 24, 2025

In New England, United States during December, the average temperature hovers around -4°C (25°F), with minimum extremes plunging to -29°C (-20°F) and occasional peaks reaching 19°C (66°F). Expect about 18 mm (0.7 in) of precipitation spread over 3 days, accompanied by a high humidity level of 84%.

December Temperature in New England

In December in New England, the average temperature is -4°C (25°F), with maximums reaching 19°C (66°F) and minimums dropping as low as -29°C (-20°F). Travelers should be prepared for a wide range of temperatures, making it essential to pack layered clothing for both warm and cold conditions.

December Weather in New England: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in New England, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In New England, December typically has an average temperature of -4°C (25°F), with highs reaching up to 19°C (66°F) and lows dropping to around -29°C (-20°F).
JanFebMarAprMayJunJulAugSepOctNovDec191531405467736960433224
Data source: Temperature data for New England 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 New England

In New England in December, the precipitation amount is 18 mm (0.7 in) over a span of 3 days.

December Precipitation Trends in New England

The chart displays monthly precipitation patterns in New England, 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 New England, December typically receives around 18 mm (0.7 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec111722326346586652521618
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in New England

In New England in December, humidity is 84%. With an average temperature of -4°C (25°F), this humidity feels like a biting chill that seeps into your bones, making outdoor activities uncomfortable and travel less enjoyable.

December Average Humidity in New England

This chart illustrates the average monthly humidity levels in New England, 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 New England is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%86%77%72%77%79%78%74%68%70%80%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in New England

In New England 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 New England, you can visit Hourly UV Index in New England.

Maximum UV Index Levels in New England for December

The chart shows the monthly maximum UV Index (UVI) for New England 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 New England typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec25599101098532
Data source: New England 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 New England Compares to Other Months

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

This table compares monthly weather conditions in New England, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (19°F)11 mm (0.4 inches)83%low
February Weather-10°C (15°F)17 mm (0.7 inches)86%moderate
March Weather-1°C (31°F)22 mm (0.9 inches)77%moderate
April Weather4°C (40°F)32 mm (1.3 inches)72%very high
May Weather12°C (54°F)63 mm (2.5 inches)77%very high
June Weather20°C (68°F)46 mm (1.8 inches)79%very high
July Weather23°C (73°F)58 mm (2.3 inches)78%very high
August Weather21°C (70°F)66 mm (2.6 inches)74%very high
September Weather16°C (60°F)52 mm (2.0 inches)68%very high
October Weather6°C (43°F)52 mm (2.0 inches)70%moderate
November Weather0°C (32°F)16 mm (0.6 inches)80%moderate
December Weather-4°C (25°F)18 mm (0.7 inches)84%low

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