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December Weather in Cambridge, United States

Last updated: June 24, 2025

In December, the average temperature in Cambridge, United States hovers around 0°C (33°F). Temperatures can range from a chilly -21°C (-6°F) to a warm 23°C (74°F). Expect around 29 mm (1.1 in) of precipitation spread over 3 days, with an average humidity of 78%. Embrace the seasonal contrasts!

December Temperature in Cambridge

In December in Cambridge, the average temperature is 0°C (33°F). The maximum can reach 23°C (74°F), while the minimum can drop as low as -21°C (-6°F). Be prepared for a wide range of temperatures during your travels.

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

The chart illustrates December temperature patterns in Cambridge, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cambridge, December typically has an average temperature of 0°C (33°F), with highs reaching up to 23°C (74°F) and lows dropping to around -21°C (-6°F).
JanFebMarAprMayJunJulAugSepOctNovDec292842506175787569524233
Data source: Temperature data for Cambridge 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 Cambridge

In Cambridge in December, the precipitation amount is 29 mm (1.1 in) over the course of 3 days.

December Precipitation Trends in Cambridge

The chart displays monthly precipitation patterns in Cambridge, 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 Cambridge, December typically receives around 29 mm (1.1 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec1918713814457716965551629
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Cambridge

In Cambridge in December humidity is 78%. With an average temperature of 0°C (33°F), this humidity feels like walking through a chilly, damp fog that clings to your skin, making every step a bit heavier and more challenging for traveling.

December Average Humidity in Cambridge

This chart illustrates the average monthly humidity levels in Cambridge, 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 Cambridge is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec73%80%64%64%76%79%77%79%70%64%75%78%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Cambridge

In Cambridge in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Cambridge, you can check the information here.

Maximum UV Index Levels in Cambridge for December

The chart shows the monthly maximum UV Index (UVI) for Cambridge 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 Cambridge typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111109643
Data source: Cambridge 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 Cambridge Compares to Other Months

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

This table compares monthly weather conditions in Cambridge, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)19 mm (0.8 inches)73%moderate
February Weather-2°C (29°F)18 mm (0.7 inches)80%moderate
March Weather5°C (42°F)71 mm (2.8 inches)64%high
April Weather10°C (50°F)37 mm (1.5 inches)64%very high
May Weather16°C (61°F)144 mm (5.7 inches)76%very high
June Weather24°C (75°F)57 mm (2.2 inches)79%extreme
July Weather26°C (79°F)71 mm (2.8 inches)77%extreme
August Weather24°C (75°F)69 mm (2.7 inches)79%very high
September Weather21°C (69°F)65 mm (2.5 inches)70%very high
October Weather11°C (52°F)55 mm (2.2 inches)64%high
November Weather5°C (42°F)16 mm (0.6 inches)75%moderate
December Weather0°C (33°F)29 mm (1.1 inches)78%moderate

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